The Fahrenheit Temperature at Which Fuel Will Ignite


The chart below shows the Fahrenheit temperature at which fuel (gasoline, diesel, propane and CNG) will ignite. Auto-ignition is the temperature when no spark is present and the fuel will ignite, such as diesels’ compression heat ignition. Flashpoint is when fuel at that temperature will ignite when exposed to a spark or flame ignition.







Editor’s note: Read Pudlewski’s comparison of diesel and CNG fuel for school buses from the July 2011 magazine edition of School Transportation News.