What's the longest you would run oil?

[segfault]

The longest I have gone was almost 11,000 miles on dino, following the manufacturer's recommendations (10k service interval). Since then, I have used synthetic at about the same interval. I would like to be able to go longer using Amsoil with analysis.

 

[darrenc]

I go between 12 and 24 K on my Jeep Grand Cherokee 4.0 with Amsoil 10w30...and have terrific wear analyses to prove it's safe with my vehicle/engine combo.