How many miles can you expect to put on a CAT 3126?

My good friend who works for Ryder Leasing tells me that the 3126 was a MUCH BETTER engine than the C7. I ran my 3126 for 9 years and over 90K miles with only one issue. I had to replace the gasket between the oil filter adapter and the block. Cat has a TSB on the problem. The fix is basically a thicker gasket with longer bolts.

Don't forget to lube the fan bearing.