Originally Posted by one tonne

Dual filter not recommended; where are you guys running the return line?

Originally Posted by Lrdchaos

The facts are not 1 out of 1000 people are going to keep a truck 250,000 miles, forget about 500k. Any dino oil and filter when changed properly will allow a engine to run that long. I can see a need for synthetics when it is really cold, but for the average person dino oil is more that adequate.