ISX CM2350 Oil Usage and Fuel Economy - Suggestions?

[Rawze]

(02-04-2019 )Smooth Wrote:  ..

I Run Rotella - Oil Usage 1 Gallon every 650 - 800 miles
...

Soemthing is very wrong there. Like others have just mentioned, even on a fresh inframe it should not be nearly that much.

I think the first 8,000 miles on my own inframe, I used about 2/3 gallon. - After that, it settled and has the typical ~1 gallon in 20k miles+.

Mine did however drop 0.7 mpg for the first ~80,000 miles until everything loosened up again, then came back to normal ... just thought I would mention that if others are curious.