Community Forums

SlickTX · 07-09-2008, 06:05 AM

I'm just a few thousand miles into my first diesel coach experience. I have a 2008 Allegro Bus with the Cummins 425hp ISL. When checking the oil it has a very black color to it. This is very diffent than my experience with gassers. I still have many thousands of miles to go before my first recommended oil service and I was wondering if the oil should look so black after just a few thousand miles?

SlickTX · 07-09-2008, 06:05 AM

I'm just a few thousand miles into my first diesel coach experience. I have a 2008 Allegro Bus with the Cummins 425hp ISL. When checking the oil it has a very black color to it. This is very diffent than my experience with gassers. I still have many thousands of miles to go before my first recommended oil service and I was wondering if the oil should look so black after just a few thousand miles?

Dave Fernandez · 07-09-2008, 06:25 AM

Hello SlickTX:

Welcome to world of Diesel Pushers. Yes in diesel engines oil will turn black, so do not worry.

RustyJC · 07-09-2008, 06:36 AM

Yep, it's soot suspended in the oil by the detergent/dispersent additives. The more "heavily fueled" the engine is, the sooner the oil will turn black.

Rusty