HEMIMANN
Senior Member
- Joined
- Dec 7, 2020
- Posts
- 9,610
- Reaction score
- 25,244
- Location
- Minneapolis, MN
- Ram Year
- 2017 2500 Laramie Crew Cab
- Engine
- 6.4L HEMI
Beyond my paygrade! I've always read (multiple different posts on BITOG) that P+ and SuperCar are the same oils except different adpacks, and that doesn't sound like what David Stoiber is suggesting above. But it does appear he is saying SC has Esters, how much...
Maybe another email could help clear it up.
(Edit: or @Travis8352 I think you know these oils inside out?)
Both P+ and SC have esters - the difference is P+ has % of Group III, SC does not.
For our purposes (Hemi lubrication with short OCI of 5k miles), P+ is sufficient IF it has enough moly and IF it kills ticks, which is unknown at this point.
Then there is the issue of viscosity for wear. SC 0W-30 is a more viscous oil with 100C vis of 10.7 cSt, the others are around 10.2 or 10.3 cSt.
This matters for wear at operating temp in summer heat and tow loads.