Red Line’s Water Wetter has been used for years to safely lower operating temperatures in water cooled engines. Compatible with all automotive radiators, it inhibits rust and provides superior cooling. One of the few products allowed by racing organizations for use in cooling systems, it has lowered my operating temps approximately 10 degrees (on average) in my Ducatis. I still use an antifreeze blend to combat corrosion, but then add water wetter because it dissipates heat as well as distilled water formulas. One bottle is enough for about 7 motorcycle engines.