“I read about an additive,think it was 6 ounces of lacquer thinner or acetone don’t recall now to every 10 gallons that could be added to the tank that would help older engines.”
Magnets on the gas line work wonders. Oh, and don’t forget water injection.
Not sure about the magnets or water but I did use the acetone in my van and it worked well for 150k miles.