25% Niromethane blend for 0.21 to 0.32 engine sport use to give high power where economy is more important than outright performance of more expensive race blend fuels. RTR Power As an RC Car hobbyist you want to enjoy running your cars and trucks, not worry about engine settings.So you want a fuel that simply delivers: power, engine protection, easy starting, long engine life and ease of use - basically a reliable power source for your car. Easy tuning The Optimix RTR blend is formulated for easy tuning in all temperature ranges for engines of all sizes. Optimix-RTR was developed especially for today' RTR nitro engines. The specific blends use the same high quality synthetic oils as our Optimix-Race blends. Optimix RTR makes starting and tuning your engine easy because its specific blend is more tolerant of incorrect settings and of temperature and humidity changes. The consistent burning provides a steady smoke trail allowing you to easily see the effects of your engine tuning. Protect your engine Optimix RTR burns cleanly, leaving no harmful residues that increase wear and decrease engine performance and lifespan. The oil in the fuel provides protection from corrosion to further extend your engine's life. Features : - Optimised oil content for RTR running - Wider tuning band more tolerant to needle mixture - Optimum performance - Smoother transition low to high power - Easy starting - Superior Fuel Economy - 5L bottle contains 32% more than US gallon bottle - Quality Synthetic Klotz oils giving improved lubrication, lower friction, anti scuff protection, rust inhibitor, more efficient burning and reduced running temperature - Manufactured in UK - Developed by Adam Skelding HPI Design & Development Engineer based upon Optifuel Race Fuels developed by Graham Alsop Hot Bodies team driver.