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Re: Synthetic Oil Study
ive used nothing but valvoline in passenger vehicles my whole life, same as my old man. never had a problem. rotella all the way every time i did an oil change on the semi's and dump trucks, and cheap fleet farm oil by the 5 gallon bucket in dozers, graders, excavators, etc. no oil relaed problems. ever. and thats 20+ years real world testing lol!
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