Klotz additive is for use with 2-Stroke glow or gas and 4-Stroke engines. Blends with methanol alcohol, nitromethane, or gasoline. Biodegradable formula ultimate in lubrication protection and performance. BeNOL fortified film strength and anti-scuff protection. Extreme load-carrying capacity to eliminate engine wear. Clean-Burn technology reduces carbon and residue build-up. De-Gummed formula reduces ring sticking. Klotz red color ror easy mixing and castor racy odor. Contains seal conditioners and preservatives. See-Through side with graduated measurements in standard and metric. Mixing chart on back of bottle. (API) SA intended for racing engines only.