genesag

[QUOTE][/I think we should also ask how many guys have ruined engine, from not doing an oil service. I have a 98-12V 180HP one with a melted piston, the engine oil at room temperature was like as grease. Also had a fram oil filter on it. The oil squirter plugged up and the piston got hot. I have no clue on how many miles on that oil change, but oil does break down. If the oil is no longer able to remove soot build-up, you will get build-up. That engine proved that. I also have a 6.7L engine that has 110000 miles on it (out of a 7.5 C&C4500) and wasn't deleted. It wasn't pretty inside.

These newer truck adds an extra firing event (post combustion), to promote extra egt's just so your dpf/cat can clean-up the particulant better. Diesel isn't as good lubricant as oil is.QUOTE]


Mike's right! That is why I would never run extended oil change interval (or recommend it) WITHOUT the use of regular oil analysis.

Also extended oil change intervals are not recommended on DPF/EGR equipped diesels because of post injection, soot buildup, and the very low level of sulphated ash in CJ4 oils (hence lower TBN).

ctnv

Every 7500 within reason with Amsoil 15-40 synthetic and Amsoil filter along with tire rotation. The last time changed the tech put 10k on sticker for next oil change.