If you know of another 30 grade that is both API SN+ or SP and HTHS of 3.5 I’m all ears. I want thick. When I put my foot down this engine lays down 311 lb-ft from 1650 to 4K rpm and the oil in the crank bearings is getting the potatoes made into French fries. So I’m looking for as thick as I can find in 30 that meets OEM requirements. I need to preserve the warranty.
Splitting hairs I know, but such is the BITOG Way.
Can you expand a bit more on how the M1 HM 10w-30 would be thicker in the real world than a 0w-40? I know that on paper the M1 0w-40 is indeed a touch thinner (11.7 vs 12cst) at 100C while only having slightly more HTHS at 3.6, just inside 40 grade.
Thinner base oil plus lots of VI right? Clever, but I don’t think VI lubricates.
I get it, you think the best oil for the car is something Xw-30 around 10cst and 3.0-3.1 HTHS. And you may be right. I’m experimenting. At worst I’ll sap a little power. I shall let the data decide. After 10k miles I will begin UOA