Originally Posted By: bobbydavro
502 00 is still a relevant specification and as said, will have a higher TBN than a 504 oil.
For this application I would definitely go for a high TBN, lower Ash doesnt help with FSi deposits.
edy, why do you think Castrol 5W-40 causes deposits?
No scientific inquiry about this, but most of the deposit cases I saw was in cars regularly maintained in dealerships.
As we talked before, Castrol sells through VW, in my opinion, for today's day and age, substandard oil. It meets VW 502.00 but not MB 229.5 which we all know is much more stringent when it comes to deposit control.
As for TBN and Low-SAPS oils, lubrizol did study where they confirmed that it actually helps with deposit build up. But IMHO, I think the issue is the way cars are exploited.