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Old 03-03-2012, 03:40 PM   #11
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This came from Hot Rod magazine-can't remember if it was online or in an issue but you can use 50/50 mix of synthetic oil and STP oil treatment. I have also heard of 50/50 mix of ATF and STP. Anyone chime in on this practice? I used the syn/STP on Zetec cams and never had any issues.
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