Originally Posted by CT_335D
How many miles on your 335d?
I was told by the BMW dealership not to add any cetane boost or diesel additive. But I noticed that you do. Does it make a difference? My 335d is still under warranty, will BMW honor the warranty if I start using the additives and cetane boost? Or is it better to wait until the warranty expires and then start using the additives?
Here in Connecticut, our diesel fuel has a cetane rating of 40. Can't find anything betterlike 45 or 50.
By law only the minimum must be posted (40). Seems premium diesel went out of favor in 2003 ish.