Originally Posted By: 2008wrx
How old is this invention? How does it work? I dont think it will work on the cars with coil packs that sit on the top? Many thanks
Pretty old invention, at least the '60s-they basically jacked the plug's heat range WAY up, off the scale, to burn off oil. I wouldn't use them on any electronically controlled engine's spark plugs, I'd be afraid of causing piston damage due to preignition.