Use pre-mixed nitro RC fuel that’s specifically labeled for cars/trucks. These blends list the nitromethane percentage and oil content on the jug, which helps with engine performance and lubrication. Many car fuels are offered around 20% nitromethane, but the best choice depends on your engine manufacturer’s recommendations.

• Match the application: Choose car/truck fuel (not airplane, heli, or boat blends) unless your manual says otherwise.
• Check the label: Look for both nitromethane % and oil %.
• Pick a size: Quarts are handy for light use; gallons can be convenient for frequent running.
• Safety: Handle fuel away from flames and heat, and follow your engine’s manual for setup.

Nitro RC engines are designed for pre-mixed nitro RC fuel that contains nitromethane and lubricant, not gasoline. Using gasoline can lead to poor running, potential engine damage, and increased safety risks because it’s not formulated for glow-style RC engines.

• Compatibility: Gasoline lacks the lubrication and blend your nitro engine expects.
• Performance: Tuning becomes difficult, starting may be unreliable, and parts can wear prematurely.
• Safety: Always fuel in a well-ventilated area, away from sparks and heat.
• Better approach: Stick with nitro RC fuel labeled for your application (car/truck, heli, airplane, or boat) and follow your engine manufacturer’s guidance.

Start by matching the fuel type to your vehicle. Nitro blends are offered for cars/trucks, helicopters, airplanes, and boats, and the nitromethane percentage can vary by category.

• Application matters: Car/truck blends are commonly around 20% nitromethane, airplanes often range near 10–25%, helicopters around 15–20%, and boats may feature higher percentages.
• Oil content: Look for the oil percentage on the label—it supports engine lubrication.
• Follow your manual: Use the nitromethane range recommended by your engine’s manufacturer.
• Quantity: Quarts are convenient for casual use; gallons can make sense for frequent running.
• Accessories: Consider a fuel filler bottle for cleaner, controlled refueling.

These factors can help you pick a blend that aligns with your engine and driving style.

The safe percentage depends on your specific engine, so it’s best to follow the manufacturer’s recommended range. Examples commonly available include car/truck blends around 20% nitromethane, helicopters around 15–20%, airplanes around 10–25%, and boats at higher percentages.

• For stock car engines: Moderate percentages (often around 20%) are popular and can be easier to tune.
• Higher percentages: Can increase power potential, but may require careful tuning and can run hotter.
• Avoid straight nitromethane: RC engines need a balanced, pre-mixed fuel that includes lubricant.
• Tip: When changing fuel percentage, make adjustments gradually and monitor engine behavior.

A few simple steps can make refueling cleaner and safer.

1. Use a filler bottle: A dedicated nitro fuel bottle with a narrow spout or aluminum straw gives you precise control.
2. Shut down and cool: Refuel with the engine off and away from heat or flames.
3. Insert securely: Fit the spout into the tank opening and use short, controlled squeezes.
4. Wipe drips: Keep a rag handy for any residue around the cap and tank area.
5. Seal and store: Close the bottle tightly and keep fuel upright, in a cool, dry place.

These steps can help reduce mess and support consistent performance, but always follow your vehicle’s manual.