Well, we dont run it as long as AmsOil says to run it due to the fact that we use the trucks as more than just daily drivers. They Duramax has about 150,000 miles on it already and I think weve changed/flushed it 3 times, 4 at the most. Last time we changed it was because my dad had to haul hay from RGV to Austin and had no time to make 2 trips so he overloaded the trailer and really overworked it. The load was so much the trailer broke an axel shackel. He flushed it just as a precaution, and it was probably getting close to being due anyhow.

I know a lot of people dont trust AmsOil because their products say they can do more than they should. And thats fine, people are entitled to their own opinion.
All I ask is that you do your own research into their products, dont take anyones word for it.
We wouldnt run AmsOil in all of our trucks if it was crap.
(02 Duramax w/Allison - 150,000 miles no problems -- 93' Dodge 1-ton Cummins 250,000, converted it from regular petrolium to AmsOil at 215,000 and it has run like a charm since -- 07 Dodge 1-ton 6.7Cummins, just got its first oil change to AmsOil. Ill keep everyone posted on the 07 )
For us, a truck is a big investment, not a toy, and we can afford to be running just any over-the-counter garbage.