Polydyne Tx7
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Polydyne Tx7
I know some say don't add any oil additives, just figured i would see what the opiniont was. My Grandfather recnetly brought me a little info on this Polydyne Tx7 stuff. Any experiences or heard any info about it. One fella was telling me his brother used it in a duramax with every 2 oil changes and it gave hime at least a 1mpg difference. I am real leary of such things as this and just wanted any input.
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From: La La Land
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