nighamreuki
Thread starter
i don't disagree with anything that you're saying except that Nissan does not mention JASO anywhere in the manual for VR30, - "only engine oils that meet the American Petroleum Institute (API) certification or International Lubricant Standardization and Approval Committee (ILSAC) certification and SAE viscosity standard"I made my share of mistakes and wrong assumptions. My interest in lubricants stems from wanting to do better maintenance on our vehicles so they last longer. Given the past and current economic situation, I want to get everything I can out of them. The only way to learn was to read past threads that longtime, established members of this forum participated in over the years.
I think it's becoming a recurring theme that someone posts a UOA and expects the members of this community to validate their conclusions. That won't happen.
Though I can't fault the OP 100% for his conclusions because Blackstone themselves and other oil analysis labs push this narrative that somehow you can conclude the wear that's going on in any of your powertrain components based on a $38 oil analysis. Or in his case, it was $58 since he asked for TBN if the price didn't go up, like with everything these days. At the end of the day, they are a business making money off people and businesses who want their oil samples analyzed, so they're incentivized to market themselves to everyone, even if it means practicing a bit of guerilla marketing.
I concluded that Castrol EDGE 0W-40 held its viscosity better than other motor oils in this UOA series. Even my conclusion could be 100% wrong because we don't know how each sample was taken under what conditions. Was the engine briefly started, the vehicle moved into a garage, stoped, and lifted? That right there could skew the flashpoint, fuel dilution, and viscosity numbers.
Sir, you may want to re-read my comments again. I posted that screenshot straight from the 2018 Q50 owner's manual, along with a shortlist of excellent and highly available lubricants. The GTR VR38 specifies Mobil 1 FS 0W-40 for street use and Motul NISMO Competition type 2193E 5W40 for track use. Mobil 1 FS 0W-40 and 5W-40 would be excellent choices. Once again, the manufacturer recommends only 0W-20 for your engine, with a wider range of options for the Daimler-Benz sourced 2.0T engine.
Bellow are the specs for the Schaeffer 9000 0W-40 lube. Please look very closely what they say. Once again, it is your engine, so of course you will do as you see fit.
View attachment 84796
cliffnotes from manual about VR30 engine oil:
0w-20 recommended -"in order to improve Fuel Economy"
meet API service NS and ILSAC with viscosity range, from the screenshot.
and i 100% agree that Castrol held up the best looking at the UOA