Recent content by zachakamp

Only because of the TBN, but I need to test my other trials.

Good to know. I also tried AMSOIL in my Hummer and in my diesel, so I should test those. The AMSOIL that I put in this Chrysler was just leftover.

I figured that the top tier AMSOIL would make the oil blend capable of at least 15k-20k; but according to the test, it's about done at 10k. The miles are mainly highway.

2013 Chrysler 300, 3.6L Pentastar 50,000 miles on engine; 10,000 miles/1 year on oil (5W-20) I had four quarts of AMSOIL Signature Series, which I used along with two quarts of Pennzoil Platinum.

Originally Posted by bismic1 If a 15W40 doesn't leak much when hot, then it isn't the 5W40 cold properties that are causing your problem. Simply put, a 5W40 is NOT a thinner oil (except for the very brief time when cold, the 5W40 is thinner than what a 15W40 would be, but still it is thicker...

I put a catch can under the crank case vent tube. It is perfectly clean.

I have a Ford truck with a 2004 Caterpillar C7 diesel engine at 70k miles (play truck, F750 pickup conversion, mostly in-town driving). I had Rotella 5W-40 synthetic in it with no issues. After upgrading the turbo, injectors, and rerating to a higher power rating; I started to get an oil leak on...