The one that carries the formal OEM approval for 229.5 spec is Synpower 5w-40 HST. You will not find 5w-40 HST at retail. It's a shop product that is sold in 55 gal drums only. Don't ask me why.
Originally Posted By: Leo
M1 0w40. I feel the PU Euro is a little 'weak' on the add pack but it still meets the spec. Plus the M1 has a a slightly higher VI.
What values do you look at to determine if the oil has a strong add pack?