Sunoco GP2R is an unleaded race fuel especially designed for 2-stroke engines. It has a low aromatic but a high saturated hydrocarbon composition resulting in a very fast burning 2-stroke race fuel. Compared to other common 2-stroke fuels the timing when running the GP2R should be retarded to reduce pressure on the pistons up-stroke. This will result in increased acceleration and throttle response. We recommend 5% mix of 2-stroke oil. Sunoco GP2R is designed to conform with current FIM regulations.