What type of fuel is used on an F-18?

The F/A-18 Super Hornet utilizes JP-5 fuel, which is a kerosene-based Jet Propellant fuel. JP-5 is specified for use in military aircraft due to its higher flash point compared to other jet fuels, which enhances safety, especially when onboard an aircraft carrier. This fuel type is designed to reduce the risk of fire and explosion in the high-risk environments of carrier operations.

JP-5 also meets the performance requirements for the F/A-18, ensuring optimal engine performance and efficiency during flight operations. The choice of fuel is critical not just for safety reasons but also for maintaining the aircraft's performance characteristics and reliability. This is why JP-5 is the correct answer, as it is the standard jet fuel used by the F/A-18 Super Hornet in military applications.