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Originally Posted by giuntos  I've performed quality audits at Shell, Citgo and a little blender named DA Lube in Indianapolis. The big guys have extensive labs and are beyond serious in their tribology. The little guys partner up with the additive companys. The additive suppliers are another ball game all together. All oils have additives. Did you know that full synthetic oil is still based on dino oil? True story I kid you not. I guess my point is that if you stick with a big name oil product you should feel confident in its R&D and quality controls at the blender. |
That's a fact and it's also the reason that different engines respond differently to different viscosity oils even from the same manufacturer. I tried different viscosities of Mobil1 extended until I found that 0W30 worked best in my 04 Titan per an oil analysis even tho I live in an area that rarely gets into the single digits in the winter but does get well over 100 in the summer.