which synthetic oil do you prefer??

j.arnaldo

...an eye opener...And to think that I gotta use up 4 more cases of Mobil 1 I bought last summer on sale! So, from now on it's R.P. or ester-based oils for my '04 Z!!! On the bright side, I'm 61, and NEVER push my baby too much, so I can keep 'er forever!

gumpy

guys becareful about putting too much reliance on this test, from what i understand it only tests a very narrow spectrum of what an oil is suppose to do. I'm a RP user myself but may change, the UOA's show that RP's aren't always the best with our engines...

LiquidZ

I agree with Gumpy.

The Timken test is not the end all be all of oil testing. This test is primarily run to determine the performance of extreme pressure additives found in an oil. Here is the ASTM link for the test: ASTM D2782 -02(2008) Standard Test Method for Measurement of Extreme-Pressure Properties of...

An oil is subject to so much more than what this test can prove. UOA's are one of the greatest, if not the greatest ways to verify the performance of an oil in your engine.

__________________

gumpy

Actually i heard UOA's are limited as well as they only show dissolved metals and not the non-dissolved stuff...

Food for thought people, i asked my taxi driver how often they change the oil. They do it every 10k km with some cheap *** gulf western oil... their engines last over 800,000km... hmmm...

6SPD_FTW

Never heard that before. The UOA's all measure the percentage of insoluble material (which is a measure of oil filtration). Otherwise, UOA's are the best way to determine how YOUR ENGINE is getting along with the oil you put in it.

My previous car was a 2007 Altima 3.5SE VQ35DE. I abused the crap out of that car and had it for 40,000 miles before trading. I have documented UOA's for nearly every oil change I performed on that car using Castrol Syntec 0W-30 (aka, German Castrol, aka, G.C.).

That is the ONLY oil I've used since the UOA's for the Altima were as perfect as you could ask for. Now the UOA's on the Z (of which there are only 2 so far) are still trending down on the wear metals, but look absolutely perfect considering miles and driving conditions.

The 0W-30 flows like a 0W oil at 32ºF. And basically, that's the only time you really care about the 0W. The only reason I use 0W is because the 0W-30 is a German engineered and produced oil. All other viscosities of Castrol Syntec are designed differently and aren't any better than Mobil1. The G.C. actually holds its viscosity better than nearly any other 30W oil at high temps, so that's all I have ever used and all I ever will use. Plus, it's not terribly expensive ($6.50/qt) and is accessible (available at all Autozones).

Late,
Trav

antbear

Dyno Tests For RP....................

Royal Purple Independent Videos

gumpy

Unless you use a very specialised place i'm pretty sure they're using a type of spectrum analysis on the oil... and from what i understand that only gets you the dissolved stuff in the oil. They do they don't centrifuge the oil and seperate all the stuff out. BITOG has more on this.

In saying that it's probably the best method of testing, but just know it's also limited...

GC is probably one of the best but i know my dealership will void my warranty for using something different to 5w30... they are so lame... i hate them...

6SPD_FTW

I understand what you're saying. Insolubles normally should be below 0.6%. On the Altima and the Z, I never had anything higher than like 0.3%. If it's high, then you have more trouble than just what's IN the oil. Means you got some issues with oil or air filtration. I guess...just throwing that out there.

Late,

Trav