I havent done much reading on it. How would you say it compairs to Opti- lube.
I've been using the Opti-Lube XPD for about 6 months in the truck and the wifes TDI Q7.
Been happy so far but a gallon of it only treats about 500 gallons. Looks like 16oz of Archoil will treat the same. And i can by 2 of the 16oz for about the same as the opti lube i might have to give it a try..

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