True that my 3K oil changing mentality is coming out of the "76 F-150 carburetor engine '70's when I did send in my 10,000 mile oil Amsoil in for an oil analysis and it came back as 10% fuel dilution, a totally depleted lubrication package with metal particles and with a note to get rid of it ASAP. Never again Amsoil and never again 10K oil changes. Early Mobil 1 in my Saab 99 I figured didn't lubricate the turbo seals and two turbos later never again Mobil 1 either. Then I'm remembering a phone call from one of our East coast sales guys who was taking his company car in for a new engine rebuild after he had been "saving time" on oil changes by running his oil 25,000 miles.
