Tomioka Racing RaceCool coolant additive is not designed for the average driver or the average engine--this high performance coolant is designed specifically for performance racing and hot rodding engines. RaceCool additive extracts heat, lowering temperatures by as much as 15 degrees F. This formula has a pH of 10.5, along with a phosphate-free, low-silicate makeup to provide excellent protection against aluminum degradation. Heatshield Products RaceCool coolant additive has completed extensive ASTM testing, along with real-world testing to ensure the best race-ready cooling performance.