I have a Puradyn bypass that I am just about ready to mount on my Buick with 192,000 on it. I will see if this can make the car last until my son is out of college. I do NOT understand at all why so many posters will spend 60-70K on a diesel pickup truck, then brag that they buy whatever oil is on sale at Wally world; and if you mention that a 3-400 dollar bypass filter can potentially double the useful life of their engine, all they heard was 300 dollar oil filter, and they think you're a lunatic.
I have already run bypass filtration for about 50,000 miles on my car and I'm now putting on a BETTER bypass filter. Oh, yeah, and I'm paying for UOA and partical counts. My oil currently has almost 20,000 miles on it and it is in 14/12/11 on ISO4406. It has far less contamination in it than new oil from the bottle.