What temperature is to Hot for your oil on a turboed built gsr...any motor?

 

oil generally takes a **** at 230 degrees

 

different motors run at different temps, but for us, yea like 230ish is the highest id want to go. i think optimal oil temp is right around 180ish

 

organic oil likes to be below 230F as stated above, synthetic will easily live to 270F and sometimes above that.

 

Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackeg &raquo;</TD></TR><TR><TD CLASS="quote">different motors run at different temps, but for us, yea like 230ish is the highest id want to go. i think optimal oil temp is right around 180ish</TD></TR></TABLE>

I recall reading that you should allow your oil to reach at least 212*F to allow for the moisture build up to evaporate, otherwise you greatly diminish the longevity of your oil.

Anybody esle?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTC_CiViC &raquo;</TD></TR><TR><TD CLASS="quote">

I recall reading that you should allow your oil to reach at least 212*F to allow for the moisture build up to evaporate, otherwise you greatly diminish the longevity of your oil.

Anybody esle?</TD></TR></TABLE>

hmm i dont know, but if thats true my ls turbo never ever hit above 205, and usually cruised at 170.

i have heard from various sources that for a turbo you need the oil to be upt to at least 160F to be thin enough to properly lubricate the turbo, i also remember hearing 180F for superchargers....

 

Oil temp in a healthy engine (measured in the pan) is about 15 degrees hotter than your water temp.Like stated before sustained oil temp above 240 will break down oil rapidly.Water will vaporize out of the oil without reaching 212 degrees.
Glenn

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackeg &raquo;</TD></TR><TR><TD CLASS="quote">

hmm i dont know, but if thats true my ls turbo never ever hit above 205, and usually cruised at 170.

i have heard from various sources that for a turbo you need the oil to be upt to at least 160F to be thin enough to properly lubricate the turbo, i also remember hearing 180F for superchargers....</TD></TR></TABLE>

some oil actually gets thicker when hot not thinner....oil ubricates best when hot anyways


Modified by D@nnY at 12:50 AM 3/1/2006

 

oil gets thinner when hot, not thicker, thats why when its like 2 degrees it cranks real slow before startup

 

not true....

10w-30 will be 10 when cold 30 when hot ...the higher the number the greater the viscosity the w only stands for rated for "winter

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D@nnY &raquo;</TD></TR><TR><TD CLASS="quote">not true....

10w-30 will be 10 when cold 30 when hot ...the higher the number the greater the viscosity the w only stands for rated for "winter</TD></TR></TABLE>

this is what i was always told. ive never tested it before though.

 

no its not like butter ...its oil with polymer additives ....

and its best to change the oil when hot so the contamination hasnt settled and will be removed with the oil.....

 

"A thin oil such as a straight 10W or even a 20W oil designed for cold weather use would probably not provide adequate lubrication for hot weather, high speed driving. Likewise, a thicker high temperature oil such as SAE 30 or 40 would probably become so stiff at sub-zero temperatures the engine might not crank fast enough to start.

Multi-viscosity grade oils have a wide viscosity range which is indicated by a two-number rating. Popular multi-viscosity grades today include 5W-20, 5W-30, 10W-30, 10W-40 and 20W-50. The first number with the "W" refers to the oil's cold temperature viscosity, while the second number refers to its high temperature viscosity."

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ibid &raquo;</TD></TR><TR><TD CLASS="quote">Oil Viscosity
The way that oil viscosity is referred to is by its weight. In this case, "weight" refers to the thickness of the oil and is usually measured with a Zahn cup. Any liquid has some viscosity and that viscosity changes depending on its temperature. Usually, viscosity (thickness) decreases as temperature increases. This also is true of engine oil. Engines need a thin oil at startup, so that it can get to the engine components quickly, but it needs a thicker oil when the engine is hot because a thin oil becomes too thin. This is why engine oils are supplied as dual-grade weights. When you see 10W-30 on a quart of oil, it means that it acts like 10 weight oil when it is cold (the "W" means winter, say -10^C), but acts like 30 weight oil when hot (100^C).

This is not to say that it is actually thicker when it is hot. Hot 30 weight oil is thinner than cold 10 weight oil. Even so, it still helps provide the benefits of both types of oil depending on its temperature. So 0W-30 oil acts like 0 weight oil when cold, but maintains a 30 weight viscosity when hot. Think of it this way: when your engine is hot, there is basically no difference between 0W-30, 5W-30, and 10W-30 oil. They are all acting like 30 weight oil at this point. It's at cold startup, when almost all engine wear occurs, that the viscosity is different.
</TD></TR></TABLE>


oil gains viscosity when hot.....which people also refer to as the thickness..... you just contradicted yourself..

incase you still cant understand heres some more info for you to read..

"The viscosity rating of a motor oil is determined in a laboratory by a Society of Automotive Engineers (SAE) test procedure. The viscosity of the oil is measured and given a number, which some people also refer to as the "weight" (thickness) of the oil. The lower the viscosity rating or weight, the thinner the oil. The higher the viscosity rating, the thicker the oil. "

10w-40

10 when cold ...and what do you know... 40 when hot...it now has a thicker wieght


Modified by D@nnY at 4:20 AM 3/1/2006

 

Well maybe we're all on the right track. - - - -
I believe 10W is thicker when cold than 50W is, when it is hot. Try pouring 10W 50W out of a container when it is 40 degrees, - heat it up and it pours much easier.
The difference is that 10W 50W, or any multi-viscosity oil, tends to act like a lighter weight oil when cold and has the characteristics of a heavier weight oil when heated. Although viscosity increases with temperature, oils are much thinner when hot than when cold. In subzero temps, 5W 30W can almost be the consistency of grease. Crankcases are sometimes heated so that oil will liquify and the engine can be started. Generally multiviscosity oils aren't quite as thin as their lower viscosity indicates (10W) and aren't really as thick as a single weight is when warm (50W) They tend to be a compromise - but a useful one!