Some automotive diesels use glow plugs for starting in cold weather. Used to mix my own fuel. 1/3 each of kerosene, ether, and castor oil and a few drops of amyl nitrate which is an ignition retarder. Without it you will get the broken crankpins,rods and wrist pins from the timing being to far advanced. If you try it, you still need a very strongly built engine. I tried a diesel head on a Royal 40 quite a few yrs ago. Flew it for about half a gallon of fuel but got tired of the black glop all over the plane. Switched it back to glow but wouldn't run right. Noticed it wet with raw fuel under the engine. Turned it over to check it out and there was a crack in the bottom of the crankcase from front to back. So much for that engine. [&o]
PS If you do try it, you'll need fuel tank fitting and lines made for gasoline as this is a petrolium product.