Originally Posted By: supercity
What do you mean by more compression? SN is irrelevant for a diesel engine.
It is possible for an oil to meet SN and A3/B4. It is also possible to have SN and C3. But it is impossible to have A3/B4 and C3 since 2010.
2 month ago i asked a auto-shop guy, about oil, and he told me, to get oil with SN spec, it got more compression.(it was after i told him with champion oil 5w30 c3, when i "floor" it, my rear wheels would spin on the tarmac, and with Valvoline XL III, it's not happen anymore.)
he wasn't an expert, i think he might heard that, and said it to me.
anyway, i'm gonna read and re-read this thread, until i can "master" the info.
guys, from my heart, THANK YOU!
btw guys, i just thought about it, my car is Japanese, you think it's better to have oil that support Japanese standard? like jaso-dl1.
or
ACEA is top notch, and that's final verdict about oil.
)