Optifuel OH1618K - Optimix Fuel 16% Nitro, 18% Klotz oil. Suitable for Heli 5 LOptifuel OH1618K Optimix 16 Fuel Designed to maximise the permitted nitro percentage in line with the new EU law permitting maximum nitromethane content. Perfect for fixed wing flyers, helicopters and boats. 16% Nitromethane and 18% Synthetic Oil. Supplied in full 5L containers not US Gallon (3. 78L). Optimix 16 is designed for sport, training and scale modellers. Works well on helicopter engines and aircraft alike, low smoke high power. Content: 5L