Re: Carbon Buildup and Stuck Valves
Quote:
Originally Posted by Charon
My goodness child! Go look at the shear. Pressure ratings. All the specs on oil from 1960. Then compare to today's oil. No comparison. Sadly I think I just found kindergarten again.
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Uh huh. Like I had mentioned already....zinc was added for a reason. And now taken away again because new engines have roller cams and rockers. But you didn't answer my question as to why oil companies like Amsoil for instance recommend zinc oil for flat tappet engines. It's still them against yourself.
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