My cat c7 has about 60k on the engine. I was working on it this weekend and noticed an engine oil leek around the area of the oil filter. It may not be the oil filter leaking but it is definitely on ...
I had a leak in the same area it turned out to be a gasket in the piping above the oil filter. Was told that the original gasket in the C-7 has a history of failure. Had a Caterpillar shop do the repair.