2012 Cummins ISX burning oil

Well u forgot to say how many miles per gallon. But I'd ur not leaking it's burning so could be time for a rebuild

 

More than likely carbon packing. Valvoline has a special oil called Blue Restore that helps with carbon packing. I costs about $100 a gal but is recommended by Cummins.

 

What's your oil analysis showing ...

 

If you are not finding oil in the coolant, you have dry air lines and tanks, it is not leaking on the ground, then it must be going through the cylinders. One sign of this is a high regeneration of the emissions system. Along with that you may see intermittent emissions related problem codes. Cummins did have a problem with piston ring quality during the 2012 to 2014 production years. Carbon packed rings and cylinder scoring have been related to this.

Miles and run hours could tell more about what’s going on. I would venture to guess an inframe is in your near future.

 

Sorry op I dont have good news for you ...my 2013 cascadia isx 450 powered started using oil at about 540k and by 684k was using a gallon every 800 miles ...tear down at that point revealed what I already knew .
Rings carbon packed ...liners polished ...cam shot , everything else looked good but did a complete overhaul with updated cylinder packs .
No issues since .
I didnt try the 100.00 a gal valvoline as theres no such thing as overhaul in a jug .
Seems to be hit or miss in the 12 and 13 engines as a guy I know has an exact mate to mine from the same fleet and hes at almost a million miles now with no issues .
Good luck !