Mobil1 5w50 oil
02-02-2005, 10:52 PM
#51
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Re: Mobil1 5w50 oil (Pompiuses)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pompiuses »</TD></TR><TR><TD CLASS="quote">
That depends on the quality of the specific oil and it's intended use. How the oil performs can easily be established by looking at the specs of the oil.</TD></TR></TABLE>
Well, he says that the parameters tell you only for example viscosity at 100C, but not if the oil lubes well in the high temperatures. The quality of lubing is given mostly by the base of the oil, that's why some quality 5w40 lubes much better that some 5w50, even if the 5w40 is more like liquid.
He also says that high revving engined like less viscosity oils and the 5w50 are usually very ..... hell why do I write all this and why I didn't use his reply
:
Petr,
I understand your logic, but it does not always work like that. It is down to shear stability, this comes from quality and not viscosity. The Silkolene Pro S 5w-40 will run at 145 deg for sustained periods of time without shearing down (thinning). This is achieved by using pao and ester base stocks, so no petroleum used.
Most petroleum based oils will shear down at the temps the Silkolene is happy at, so a 10w-60 within a few hours on the track or a few thousand miles will be functioning as a 10w-40 or lower!
You can use a 10w-40, but most of these are semi synthetic as fully synthetics generally drop down to the 5w-40 grade for better cold start, they are both the same when hot.
The 5w-50 does seem the ultimate grade however there is a catch. Most oil manufacturers are phasing this grade out, this is because the amount of viscosity improver needed to keep the oil in grade, so basically they have to prop it up! VI Improver is an addative and gets used up, so under track use, again will break down quite quick.
Can you get Motul out there??
Cheers
Guy.
That depends on the quality of the specific oil and it's intended use. How the oil performs can easily be established by looking at the specs of the oil.</TD></TR></TABLE>
Well, he says that the parameters tell you only for example viscosity at 100C, but not if the oil lubes well in the high temperatures. The quality of lubing is given mostly by the base of the oil, that's why some quality 5w40 lubes much better that some 5w50, even if the 5w40 is more like liquid.
He also says that high revving engined like less viscosity oils and the 5w50 are usually very ..... hell why do I write all this and why I didn't use his reply
:Petr,
I understand your logic, but it does not always work like that. It is down to shear stability, this comes from quality and not viscosity. The Silkolene Pro S 5w-40 will run at 145 deg for sustained periods of time without shearing down (thinning). This is achieved by using pao and ester base stocks, so no petroleum used.
Most petroleum based oils will shear down at the temps the Silkolene is happy at, so a 10w-60 within a few hours on the track or a few thousand miles will be functioning as a 10w-40 or lower!
You can use a 10w-40, but most of these are semi synthetic as fully synthetics generally drop down to the 5w-40 grade for better cold start, they are both the same when hot.
The 5w-50 does seem the ultimate grade however there is a catch. Most oil manufacturers are phasing this grade out, this is because the amount of viscosity improver needed to keep the oil in grade, so basically they have to prop it up! VI Improver is an addative and gets used up, so under track use, again will break down quite quick.
Can you get Motul out there??
Cheers
Guy.
02-02-2005, 11:06 PM
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Re: Mobil1 5w50 oil (Pompiuses)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pompiuses »</TD></TR><TR><TD CLASS="quote">How can you know if the oil lubes well in the high temperatures based on the specs?</TD></TR></TABLE>
I dind't say that, you said How the oil performs can easily be established by looking at the specs of the oil. IMO the specs are nice, but the base of the oil is maybe even more important (?)
Please don't get me wrong, I'm not offended against anybody, I just found that interesting thread on itr-dc2 so I wanted to share it. It makes sense a bit, since the guy is testing the oils somehow. As he said, yes, in hight temps the 5w50 will keep higher viscosity than 5w40, but the 5w50 or 10w60 can break down much faster than the 5w40. Perfect example is your experience with the 10w60 oil: The 10w60 seem to work fine at the track, but lasts no more than about 3000km before its broken down and oil consumption get crazy high.
Finally, who knows what viscosity is the right one for our b18c5-6 at high temps? Is it the viscosity of 10w60 (22 mm2/s) or viscosity of 5w40 (14 mm2/s) ? I think nobody knows. Now isn't it better to use the viscosity that Honda tested (x-w40), but use very quality 5w40 oil that can stand the high temperatures and keeps the requested low viscosity?
I dind't say that, you said How the oil performs can easily be established by looking at the specs of the oil. IMO the specs are nice, but the base of the oil is maybe even more important (?)
Please don't get me wrong, I'm not offended against anybody, I just found that interesting thread on itr-dc2 so I wanted to share it. It makes sense a bit, since the guy is testing the oils somehow. As he said, yes, in hight temps the 5w50 will keep higher viscosity than 5w40, but the 5w50 or 10w60 can break down much faster than the 5w40. Perfect example is your experience with the 10w60 oil: The 10w60 seem to work fine at the track, but lasts no more than about 3000km before its broken down and oil consumption get crazy high.
Finally, who knows what viscosity is the right one for our b18c5-6 at high temps? Is it the viscosity of 10w60 (22 mm2/s) or viscosity of 5w40 (14 mm2/s) ? I think nobody knows. Now isn't it better to use the viscosity that Honda tested (x-w40), but use very quality 5w40 oil that can stand the high temperatures and keeps the requested low viscosity?
02-03-2005, 04:41 AM
#54
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Re: Mobil1 5w50 oil (petrv)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by petrv »</TD></TR><TR><TD CLASS="quote">
I dind't say that, you said How the oil performs can easily be established by looking at the specs of the oil. IMO the specs are nice, but the base of the oil is maybe even more important (?)
</TD></TR></TABLE>
The HTHS spec tells you something about the performance at high temps.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">Finally, who knows what viscosity is the right one for our b18c5-6 at high temps? Is it the viscosity of 10w60 (22 mm2/s) or viscosity of 5w40 (14 mm2/s) ? I think nobody knows. Now isn't it better to use the viscosity that Honda tested (x-w40), but use very quality 5w40 oil that can stand the high temperatures and keeps the requested low viscosity?</TD></TR></TABLE>
There is not 1 ideal viscosity for the B18C6. According to Honda (Shop Manual) you should choose according to the temperature.
Copy and paste this link in a new window:
http://www.imagestation.com/pi...g.jpg
I dind't say that, you said How the oil performs can easily be established by looking at the specs of the oil. IMO the specs are nice, but the base of the oil is maybe even more important (?)
</TD></TR></TABLE>
The HTHS spec tells you something about the performance at high temps.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">Finally, who knows what viscosity is the right one for our b18c5-6 at high temps? Is it the viscosity of 10w60 (22 mm2/s) or viscosity of 5w40 (14 mm2/s) ? I think nobody knows. Now isn't it better to use the viscosity that Honda tested (x-w40), but use very quality 5w40 oil that can stand the high temperatures and keeps the requested low viscosity?</TD></TR></TABLE>
There is not 1 ideal viscosity for the B18C6. According to Honda (Shop Manual) you should choose according to the temperature.
Copy and paste this link in a new window:
http://www.imagestation.com/pi...g.jpg
02-03-2005, 05:10 AM
#55
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Re: Mobil1 5w50 oil (DutchITR1689)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">There is not 1 ideal viscosity for the B18C6. According to Honda (Shop Manual) you should choose according to the temperature.</TD></TR></TABLE>
That's the first time in a long time I've seen a straight weight (rather than a multi-viscosity) mentioned in a manual.
It's also interesting that there is no single viscosity that is recommended for the entire range of temperatures that some of us here in the States experience, from the coldest winter temperatures to the warmest summer temperatures. Which means that, for those environments, it is recommending that oil be changed with the seasons, not just when you reach certain mileage or time intervals.
That's the first time in a long time I've seen a straight weight (rather than a multi-viscosity) mentioned in a manual.
It's also interesting that there is no single viscosity that is recommended for the entire range of temperatures that some of us here in the States experience, from the coldest winter temperatures to the warmest summer temperatures. Which means that, for those environments, it is recommending that oil be changed with the seasons, not just when you reach certain mileage or time intervals.
02-03-2005, 05:20 AM
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Re: Mobil1 5w50 oil (nsxtasy)
You can see in this table that 5W-30 and 10W-30 are starting to get critical when ambient temp. reaches 35 deg.C or 90 F.
If you interpolate the info on the table you could say 5W-40 is suitable for the whole range of temperature.......0W-40, 5W-50 would also be suitable.
If you interpolate the info on the table you could say 5W-40 is suitable for the whole range of temperature.......0W-40, 5W-50 would also be suitable.
02-03-2005, 05:53 AM
#57
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Re: Mobil1 5w50 oil (DutchITR1689)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">You can see in this table that 5W-30 and 10W-30 are starting to get critical when ambient temp. reaches 35 deg.C or 90 F.</TD></TR></TABLE>
I wouldn't call it "critical". They are just not recommended at temperatures over 35 C.
However, the 10W30 is recommended at temperatures colder than the temperatures at which it is specified as acceptable in the States. Go figure.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">If you interpolate the info on the table you could say 5W-40 is suitable for the whole range of temperature.......0W-40, 5W-50 would also be suitable.</TD></TR></TABLE>
That's not true. None of those viscosities are recommended at temperatures below -20 C. That may not be relevant if it doesn't get that cold where you live. But where I live, it does.
I wouldn't call it "critical". They are just not recommended at temperatures over 35 C.
However, the 10W30 is recommended at temperatures colder than the temperatures at which it is specified as acceptable in the States. Go figure.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">If you interpolate the info on the table you could say 5W-40 is suitable for the whole range of temperature.......0W-40, 5W-50 would also be suitable.</TD></TR></TABLE>
That's not true. None of those viscosities are recommended at temperatures below -20 C. That may not be relevant if it doesn't get that cold where you live. But where I live, it does.
02-03-2005, 06:11 AM
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Re: Mobil1 5w50 oil (nsxtasy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote">
However, the 10W30 is recommended at temperatures colder than the temperatures at which it is specified as acceptable in the States. Go figure.
</TD></TR></TABLE>
So which manual is correct, this one or the USDM one? This is a scan from the USDM Helms Manual:
http://www.imagestation.com/pi...g.jpg
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote">
That's not true. None of those viscosities are recommended at temperatures below -20 C. That may not be relevant if it doesn't get that cold where you live. But where I live, it does.
</TD></TR></TABLE>
If 5W-30 is suitable for temp. below -20 C. don't you think 5W-40, 0W-40 and 5W-50 would be suitable too? What do other people think about this reasoning?
Modified by DutchITR1689 at 4:54 PM 2/3/2005
However, the 10W30 is recommended at temperatures colder than the temperatures at which it is specified as acceptable in the States. Go figure.
</TD></TR></TABLE>
So which manual is correct, this one or the USDM one? This is a scan from the USDM Helms Manual:
http://www.imagestation.com/pi...g.jpg
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote">
That's not true. None of those viscosities are recommended at temperatures below -20 C. That may not be relevant if it doesn't get that cold where you live. But where I live, it does.
</TD></TR></TABLE>
If 5W-30 is suitable for temp. below -20 C. don't you think 5W-40, 0W-40 and 5W-50 would be suitable too? What do other people think about this reasoning?
Modified by DutchITR1689 at 4:54 PM 2/3/2005
02-03-2005, 06:34 AM
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Re: Mobil1 5w50 oil (DutchITR1689)
I found this in the USDM S2000 Helms Manual. Interesting:
http://www.imagestation.com/pi...g.jpg
1990 CRX VTEC Shop Manual:
http://www.imagestation.com/pi...g.jpg
Modified by DutchITR1689 at 4:47 PM 2/3/2005
http://www.imagestation.com/pi...g.jpg
1990 CRX VTEC Shop Manual:
http://www.imagestation.com/pi...g.jpg
Modified by DutchITR1689 at 4:47 PM 2/3/2005
02-03-2005, 06:51 AM
#60
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Re: Mobil1 5w50 oil (DutchITR1689)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">So which manual is correct, this one or the USDM one?</TD></TR></TABLE>
There is no such thing as "correct". The USM (not "USDM", since the US is not a "domestic" market) manual gives one set of recommendations for the ITR, and the European manual gives a different set of recommendations for the ITR. Each is the "official" manufacturer's recommendations for its particular market. And, of course, it's up to you whether to follow those recommendations or not.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">If 5W-30 is suitable for temp. below -20 C. don't you think 5W-30, 0W-40 and 5W-50 would be suitable too?</TD></TR></TABLE>
Well, if 5W30 is suitable, then I'm sure that 5W30 is suitable, too.
As for the other viscosities, they are clearly not recommended by Honda in the owner's manual for use in those frigid temperatures. You can question (or guess at) why, and you can disagree and ignore their advice if you like, but that's what the manual says.
As for the USM S2000 manual, or the Euro CRX manual (or my USM NSX manual which specifies 10W30), it's clear that Honda's engineers make different recommendations for different cars. I'm not sure what point you might be trying to make...
There is no such thing as "correct". The USM (not "USDM", since the US is not a "domestic" market) manual gives one set of recommendations for the ITR, and the European manual gives a different set of recommendations for the ITR. Each is the "official" manufacturer's recommendations for its particular market. And, of course, it's up to you whether to follow those recommendations or not.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">If 5W-30 is suitable for temp. below -20 C. don't you think 5W-30, 0W-40 and 5W-50 would be suitable too?</TD></TR></TABLE>
Well, if 5W30 is suitable, then I'm sure that 5W30 is suitable, too.
As for the other viscosities, they are clearly not recommended by Honda in the owner's manual for use in those frigid temperatures. You can question (or guess at) why, and you can disagree and ignore their advice if you like, but that's what the manual says.As for the USM S2000 manual, or the Euro CRX manual (or my USM NSX manual which specifies 10W30), it's clear that Honda's engineers make different recommendations for different cars. I'm not sure what point you might be trying to make...
02-03-2005, 07:01 AM
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Re: Mobil1 5w50 oil (nsxtasy)
OK, I give up scanning all those USDM and Euro Shop manuals (I have too many of them ). People should make their own choice after studying these scans. Discussion is useless IMO.
I already have the USDM NSX Helms manual, but I am looking for the Euro NSX shop manual. Anybody have that? I wonder what they recommend.
). People should make their own choice after studying these scans. Discussion is useless IMO.I already have the USDM NSX Helms manual, but I am looking for the Euro NSX shop manual. Anybody have that? I wonder what they recommend.
02-03-2005, 07:32 AM
#62
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Re: Mobil1 5w50 oil (DutchITR1689)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">Discussion is useless IMO.
</TD></TR></TABLE>
You can only discuss if you have the correct opinion! -Chris N
Just kidding. Thanks for posting up those numbers. I found the 1990 CRX one particularly interesting (5w30, only if it's freezing!?), and the delta between B18C5 and B18C6, for some yet-to-be-understood reason.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote">There is no such thing as "correct". </TD></TR></TABLE>
Ah ha! I knew you were wrong! And you admit it! I think a mathematician would jump in with the difference between True and Not False, or maybe False versus Not True.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote"> The USM (not "USDM", since the US is not a "domestic" market) </TD></TR></TABLE>
The American Honda Motor Co., Inc might disagree. (OK, I'll shut up now!)
We could bring the Heavy Oil vs. Thin Oil debate over to the UN for resolution at Nation States!
</TD></TR></TABLE>
You can only discuss if you have the correct opinion! -Chris N
Just kidding. Thanks for posting up those numbers. I found the 1990 CRX one particularly interesting (5w30, only if it's freezing!?), and the delta between B18C5 and B18C6, for some yet-to-be-understood reason.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote">There is no such thing as "correct". </TD></TR></TABLE>
Ah ha! I knew you were wrong! And you admit it! I think a mathematician would jump in with the difference between True and Not False, or maybe False versus Not True.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxtasy »</TD></TR><TR><TD CLASS="quote"> The USM (not "USDM", since the US is not a "domestic" market) </TD></TR></TABLE>
The American Honda Motor Co., Inc might disagree. (OK, I'll shut up now!)
We could bring the Heavy Oil vs. Thin Oil debate over to the UN for resolution at Nation States!
02-03-2005, 07:34 AM
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Re: Mobil1 5w50 oil (Chris F)
I will probably end up using 0w30 motul 300v in the miata... low revs, low stress, low power... keep the pumping losses to a minimum.
02-03-2005, 12:03 PM
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Re: Mobil1 5w50 oil (.RJ)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jay from bobistheopilguy »</TD></TR><TR><TD CLASS="quote">HTHS is viscosity. It's just a different way of measuring it. It is dynamic viscosity measured at high temperature and high shear rates compared to kinematic viscosity which is usually measured at 40c or 100c and very low shear rates (under the pull of gravity in a tube).
HTHS has better correlation to the operating conditions in an engine, and is a more accurate guage of viscosity than kinematic viscosity. Kinematic viscosity, on the other hand, has the advantage of being cheaper and easier to measure.
</TD></TR></TABLE>
HTHS is a better real world indicator of viscosity. some european automakers have allow all different viscosities as long it means a certain HTHS number.
castrol syntec 0w-30 a.k.a. castrol SLX 0w-30 has an hths of 3.6
mobil one 0w-40 has an hths of 3.6
they both have the same viscosity.
castrol RS 0w-40 has an hths of 3.7, so it is not that much thicker than castrol syntec 0w-30.
HTHS has better correlation to the operating conditions in an engine, and is a more accurate guage of viscosity than kinematic viscosity. Kinematic viscosity, on the other hand, has the advantage of being cheaper and easier to measure.
</TD></TR></TABLE>
HTHS is a better real world indicator of viscosity. some european automakers have allow all different viscosities as long it means a certain HTHS number.
castrol syntec 0w-30 a.k.a. castrol SLX 0w-30 has an hths of 3.6
mobil one 0w-40 has an hths of 3.6
they both have the same viscosity.
castrol RS 0w-40 has an hths of 3.7, so it is not that much thicker than castrol syntec 0w-30.
02-03-2005, 12:08 PM
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Re: Mobil1 5w50 oil (ejprimo)
I see that castrol rs 0w40 has a HTHS value like this:
HTHS CEC L-36-A-90 cP = 3.7
....while mobil1 0w40 like this:
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 = 3.6
Is this two different standards? If so what's the difference?
HTHS CEC L-36-A-90 cP = 3.7
....while mobil1 0w40 like this:
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 = 3.6
Is this two different standards? If so what's the difference?
02-03-2005, 12:27 PM
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Re: Mobil1 5w50 oil (Pompiuses)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pompiuses »</TD></TR><TR><TD CLASS="quote">I see that castrol rs 0w40 has a HTHS value like this:
HTHS CEC L-36-A-90 cP = 3.7
....while mobil1 0w40 like this:
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 = 3.6
Is this two different standards? If so what's the difference?
</TD></TR></TABLE>They are identical according to this site: http://www.ravenfield.com/methods.htm
CEC = European
ASTM = American
HTHS CEC L-36-A-90 cP = 3.7
....while mobil1 0w40 like this:
HTHS Viscosity, mPa·s @ 150ºC ASTM D 4683 = 3.6
Is this two different standards? If so what's the difference?
</TD></TR></TABLE>They are identical according to this site: http://www.ravenfield.com/methods.htm
CEC = European
ASTM = American
02-03-2005, 12:32 PM
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Re: Mobil1 5w50 oil (Chris F)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F »</TD></TR><TR><TD CLASS="quote">
I found the 1990 CRX one particularly interesting (5w30, only if it's freezing!?), and the delta between B18C5 and B18C6, for some yet-to-be-understood reason.
</TD></TR></TABLE>
That's indeed interesting. It's the same in the NSX Service Manual:
Also the same in the Dutch NSX user manual:
http://www.nsxprime.com/photop...9.JPG
I found the 1990 CRX one particularly interesting (5w30, only if it's freezing!?), and the delta between B18C5 and B18C6, for some yet-to-be-understood reason.
</TD></TR></TABLE>
That's indeed interesting. It's the same in the NSX Service Manual:
Also the same in the Dutch NSX user manual:
http://www.nsxprime.com/photop...9.JPG
02-03-2005, 12:33 PM
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Re: Mobil1 5w50 oil (ejprimo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ejprimo »</TD></TR><TR><TD CLASS="quote">
HTHS is a better real world indicator of viscosity.
mobil one 0w-40 has an hths of 3.6
castrol RS 0w-40 has an hths of 3.7
</TD></TR></TABLE>
Castrol has the better HTHS number, but Mobil1 has a thicker viscosity. What's better?
HTHS is a better real world indicator of viscosity.
mobil one 0w-40 has an hths of 3.6
castrol RS 0w-40 has an hths of 3.7
</TD></TR></TABLE>
Castrol has the better HTHS number, but Mobil1 has a thicker viscosity. What's better?
02-03-2005, 12:49 PM
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Re: Mobil1 5w50 oil (Pompiuses)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pompiuses »</TD></TR><TR><TD CLASS="quote">
Castrol has the better HTHS number, but Mobil1 has a thicker viscosity. What's better?
</TD></TR></TABLE>I think the difference is small. They are both good enough for me, if I only look at the specs.
I have found more data. These are all the grades of Castrol Syntec that should be available in USA: http://www.castrol.com/liveass...a.pdf
Castrol has the better HTHS number, but Mobil1 has a thicker viscosity. What's better?
</TD></TR></TABLE>I think the difference is small. They are both good enough for me, if I only look at the specs.
I have found more data. These are all the grades of Castrol Syntec that should be available in USA: http://www.castrol.com/liveass...a.pdf
02-03-2005, 02:22 PM
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Re: (.RJ)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RJ »</TD></TR><TR><TD CLASS="quote">4.2</TD></TR></TABLE>
== 4.0L
== 4.0L
02-03-2005, 09:09 PM
#73
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Re: (Chris F)
Is there any descriptipon of the oil parameters on the internet? I know viscosity, flash and pour point, but I don't know what the HTHS, Total base number etc. mean.
Additionally, does anybody know anything about this:
The Silkolene Pro S 5w-40 will run at 145 deg for sustained periods of time without shearing down (thinning). This is achieved by using pao and ester base stocks, so no petroleum used.
Are the PAO or Ester of what really better than the other synthetics?
Additionally, does anybody know anything about this:
The Silkolene Pro S 5w-40 will run at 145 deg for sustained periods of time without shearing down (thinning). This is achieved by using pao and ester base stocks, so no petroleum used.
Are the PAO or Ester of what really better than the other synthetics?
02-04-2005, 12:49 AM
#74
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Re: Mobil1 5w50 oil (DutchITR1689)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 »</TD></TR><TR><TD CLASS="quote">I think the difference is small. They are both good enough for me, if I only look at the specs.
</TD></TR></TABLE>
Yes, but why is HTHS a better real world indicator of viscosity than the viscosity number itself?
</TD></TR></TABLE>
Yes, but why is HTHS a better real world indicator of viscosity than the viscosity number itself?
02-04-2005, 03:51 AM
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Re: Mobil1 5w50 oil (Pompiuses)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pompiuses »</TD></TR><TR><TD CLASS="quote">
Yes, but why is HTHS a better real world indicator of viscosity than the viscosity number itself?
</TD></TR></TABLE>
HTHS = 'High Temperature High Shear'
Yes, but why is HTHS a better real world indicator of viscosity than the viscosity number itself?
</TD></TR></TABLE>
HTHS = 'High Temperature High Shear'