Thank you for your response ? I realize that I am not very knowledgeable in oil composition and bearly understand SN OR HI MILAGE PLATNIUM GOLD , SILVERTOP etc but have learned much from the post like mr Wilson and others have made and formed my oil change policies for my type of driving.
My cars oil changes have changed over the years as I have learned . My Oldsmobile devil went 227k. My Altima 04 was given away at 180 k to someone that needed a car . The engine and tranny were still good. The tranny had issues around 150k . Armed with what I learned here, I was able to fix the 1 to second gear hard shift with proper fluid changes and additives. In 1967 when I started to change my oil, things were much different, advancements came fast. ant hard to keep up with the truth until BOB. Forgive, overlook the truly ignorant question and educate this business major with and engineers insight. TKS DCG