i heard and read but was wondering for sure, that the new mobil 1 is not fully synthetic and that castrol syntec is 100% synthetic. Is this true?? so castrol is better because its 100%. This is what i heard but i just wanted to be sure. So let me know

 

Actually it's the other way around. Castrol is not a true synthetic but a highly modified dyno oil. Mobil is mum about their lastest formulation of Mobil 1 which some believe may not be fully synthetic anymore. Check these links out:

http://www.synthetics-unlimited.com/castrol.htm
http://www.geocities.com/Yosem...s.htm
http://www.castrolusa.com/syntecresponse.html

Mike

 

so then why do they advertise it as Fully synthetic?

so the mobil1 is a real and true 100% synthetic and Castrol Is not?

 

I also heard that Castrol Syntec was indeed not full, however, it does not matter; either oil will provide enough protection for what you are doing, don't worry.

 

redline and amsiol are the ony 2 truely 100% pure synthectic that I know of.

 

Seems the word 'synthetic' is getting bastardized so you don't know what it means anymore. Something meaningfull would be that the oil is made from a type III feedstock or a type IV feedstock. Trouble is, you can't always find that information...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 57STS &raquo;</TD></TR><TR><TD CLASS="quote">redline and amsiol are the ony 2 truely 100% pure synthectic that I know of.</TD></TR></TABLE>

Redline and Amsoil are the only two furmulators that offer street oils that are truely full synthetic that I am awhere of.
Companies like Royal Purple have true synthetic oils but it is their race-only oils, which should not be used on a street driven engine.

Bolth Mobil 1 and Castrol Syn. are based on hydrocracked base stocks, which are in fact mineral oils.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SLPR &raquo;</TD></TR><TR><TD CLASS="quote">... Bolth Mobil 1 and Castrol Syn. are based on hydrocracked base stocks, which are in fact mineral oils.</TD></TR></TABLE>
Really? I was pretty sure Mobil 1 used PAO feedstock, which is type IV, right? Or is this the 'new formulation' that someone mentioned? That's what I meant about having a hard time understanding what it's really made from...

 

I personally think it's all a bunch of useless gibberish.... I change my oil EVERY 3K miles w/ Valvoline Max Life, and the engine does not burn or leak a single drop of oil w/ 135K miles on the clock. And yes I take the engine to redline or close to it at least once a day or at least once every time I drive it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">
Really? I was pretty sure Mobil 1 used PAO feedstock, which is type IV, right? Or is this the 'new formulation' that someone mentioned? That's what I meant about having a hard time understanding what it's really made from...</TD></TR></TABLE>

Might be so, I've never looked closely at their new tri-syn formula. But even still I'm sure it is not built like RedLine oils.
Anyways PattrickGSR brings up a good point, any oil when changed at aggressive intervals will work well. I also use Max Life at 2500-3000 intervals.
If I know I'm going to see more track use I switch to RedLine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeDonDeRosa &raquo;</TD></TR><TR><TD CLASS="quote">so then why do they advertise it as Fully synthetic?

so the mobil1 is a real and true 100% synthetic and Castrol Is not?</TD></TR></TABLE>

They are adverstised as synthetic to make money. Most people don't know the difference or care.

Mike