Is regular Sea Foam or High Mileage better for my 2013 Audi Q5? [SOLVED]

Thanks for the question. As far as comparing regular Sea Foam and High Mileage, the High Mileage is formulated to be a strong cleaner intended for years of stubborn buildup. That’s what I’d go with in your Audi.

Tip: to get the most cleaning power out of a can of High Mileage, wait until the fuel tank is low (1/8 tank or so), and then add a full 16 oz can. Drive at least 10-20 miles before refueling. That creates a high cleaning concentration and gives the treated fuel time to clean.