When I was swapping a 5.0 from my dad's wrecked GT into a 4 cyl LX, we pulled the valve covers off and everything was so clean - a film was present but that's it. All he did was change the oil regulary with the cheapest 10w-30 he could find. The engine had about 160,000 miles on it and had never seen a single additive.
I've been using Mobil 1 since I got mine, maybe I'm just buying into the hype, but I feel pretty good about putting it in, if for no other reason than extending the change interval.
no but it makes you look like fubar with all the bitching about nothing, bumping threads from 2 years ago to bitch some more
bitch bitch bitch, turn out to be wrong. Just trying to save you from looking like a jackass. guess Im too late though.