ISX15 CM2250 oil consumption

[Waterloo]

I didn't want to say the "I" word... Start tearing things apart, look in the crankcase filter box, are you using the old filter or the new forever filter? I would start there. If you have no idea what that is, it is the box on the driver side front of the motor. Open that up and inspect the filter, I think it is 10 mm or 8 mm bolts holding the cover on, the bolts do not come all the way out, so don't try to remove them. Also becareful removing the sensor on the front edge of the box, I think it requires a 3 mm Allen wrench to remove that screw if you cannot disconnect from the wire harness.

Then pull the plumbing off the CAC to the Turbo, you are looking for oil in the CAC and turbo, good time to inspect the turbo, I'm in mine right now, just did an overhead.

Have you done an overhead? I would open her up and take a look at the cam and rollers, Cummins quickserve has a step by step on how to do this, and Rawze has the video that really explains it all in the video section. You will need to learn how to do this if you plan on surviving out here.

Any oil in the coolant? How are your coolant levels?

Also, on the driver side of the block, behind the fuel filter is your oil pressure sending unit, they can really leak some oil when the o ring fails, and it is difficult to spot at times. Also above that and towards the front of the truck in the head is the Jake brake harness, they can leak quite a bit too.

May want to remove the DPF and DOC cans to inspect them. Cheaper to do it yourself, one of those things you will need to learn if you keep the mandate.

That is off the top of my head... I am sure there are other places to check, others will chime in.