On this topic, my understanding that 504 is only relevant for those who stretch their service intervals out longer (hence reference to 'long life').
Given that most of us do it shorter (7,500km or 6 months), 502 is ample which is the off the shelf Castrol stuff.
Given that most of us do it shorter (7,500km or 6 months), 502 is ample which is the off the shelf Castrol stuff.
Comment