This product solves the problems of residues left by modern fuels
I started using this product after I had problems with modern fuels "going off" with time - this product solves the problems, even after 6 months my classic bikes start up easily with this additive in the fuel tank and there is no gumming up of carbs - highly recommended if the bike is being laid up for winter, also used in the fuel system of a MAZDA MX 5 which is off the road for 6 months through winter