Does roush tell you what
oil to use? I know there have been allot of changes in the oils over the years and many are not good for some motors. The feds made it hard for the
oil company's and lots of things have been removed from the oils. I know for some time we could not keep cams in motors and it was the lack of
zinc and a few other things that were not in the
oil anymore. I am very carful what oil I use in fresh builds and older style motors.
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