quote:Originally posted by headfirst:
I have an opportunity to but either SJ Delvac 1 or SL delvac 1 which is better?
From what I understand the SL is for 2001 vehicles and newer while the SJ is for 2001 and older...I use both because the newest vehicle I have is a 2001 Jeep so it's a non-issue for me...till the SJ runs out
Additive package of both grades far exceeds a need of gas engines and the majority of passanger car diesels. Not sure, but if to be based on PDS its SJ stuff could have better base oil. The only problem we never know exactly when this or that manufacturer changes its oil formulation. Quite often it happens before the oil is qualified for a new quality level.