Originally Posted By: Matagonka
Which one would you choose? OCI would be about 10-13K. I've seen plenty of Mobil 1 Extended Performance used oil analysis but not so much on Castrol EDGE Extended Performance.
I am also interested to know, based on what I read Castrol EDGE Extended Performance seems better.
Mobil 1 Extended Performance SN version is great, but not the SM version.