If I had to guess the Edge oils are largely III based. Maybe some IV/V but I don't know. The 0w40 is PAO based.
Correct. Edge 0W-30 and 0W-40 A3/B4 are currently 25 - 50% PAO-based, with the rest being Group III -- the PAO-based "German Castrol" A3/B4 has been discontinued. Other Edge products seem to be Group-III-based. There is a PAO-based Edge 0W-30 C3 but it's not available in the US.
Low pour point, high flash and low noack are good indicators of base oil quality.
Too bad most manufactures do not report the accurate figures on the above parameters in the MSDS.
Low pour point, high flash and low noack are good indicators of base oil quality.
Too bad most manufactures do not report the accurate figures on the above parameters in the MSDS.