Originally Posted By: Gokhan
Originally Posted By: BeerCan
3 of my uoa's are 30 weight oil and 2 are with 40 weight. The wear numbers are almost identical. The missing 1st uoa on this sheet is posted in a different thread if you care to look. I don't see these numbers as excessive wear in anyway.
It's GC 0W-30 and GC 0W-40 right? These are both ACEA A3/B4 oils, and therefore, their viscosities are practically identical, as the HTHSV is what really matters, and this would be in the 3.5 - 3.7 cP range for either oil. So, yes, you would expect to see identical results with GC 0W-30 or GC 0W-40.
I see that your engine recommends regular 5W-30, which would have an HTHSV around 3.0 cP, and I understand that you're worried about oil thinning due to fuel dilution.
Yeah this one is all Castrol. My 2011 got mostly Kendal 5w-30 and IIRC the numbers were very similar.
TBH I am not using the 40wt because I think it is better than 30wt. I am using it because it is cheaper than the Edge 30wt. Though I will admit to using the Edge 0w30 because of its HTHS numbers in the first place. Once my supply of Edge is gone I will likely switch back to my Kendal stash. By that time my truck will be close to 100k I suppose, unless I trade it in.