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#6
10-16-2012, 07:21 PM
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My father's 72' SS 454 has around 7K miles on the engine. (Flat tappet cam) I put Rotella in it, just cheap oil that has zinc in it. The cam in it is still doing just fine. My oil change routine for that car is 3K miles or 6 months - whatever comes first. I swear some people own stock in roller cans the way they try to pump them.
One of the other advantages of a flat tappet is lower seat pressure on the valve springs. They last longer, and are easier on the rest of the valvetrain.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi 1969 Malibu COPO L72/M20/12 bolt 3.31 posi 1968 Malibu LQ9/4L80E/12 bolt 3.73 posi 
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