Oil usage
I have a 2014 579 pete with the ISX cummins 525 hp and it started using oil at 150000 miles so I took it to the local cummiins shop and they said it was carbon packed between the top of the pistons and liner .So they tore it down and put the latest and greatest pistons and liners in it and that was done at 195000 and now it has 206000 on it and it is still using freaking oil .... So has anybody else have this problem ??