Archoil is great as a gas additive in winter to keep the effects of ethanol at bay. It's also essential for small engines if they're not used regularly. The fuel stays fresh. I add it to my 2 cycle mix for my 28 year old snowblower and it starts on the first pull!
First full tank didn’t do much, the sencond full tank my check engine light finally went off related to an 02 sensor problem i had. Guess it does do some sort of cleaning.