I’ve used the Berryman B-12 Chemtool fuel system cleaner in my 70 year old 1947 Ford 8n Tractor for the past 7 years that I’ve owned it to keep it running rite. One bottle a season keeps my 8 N running like a champ whether I’m clearing snow from my driveway, mowing the grass or simply giving hay rides. Hunka B-12 really helps battle those ethanol Gremlins.