This product is great for removing rubber and tar from fender wells and worked great for removing bugs and trash from radiator.
The engine has a lot of electrical parts, and they don't recommend using a lot of water. I put a 1/2 inch of Warhorse and filled spray bottle with water. Shook it up. I sprayed this product diluted in a spray bottle. I let is set a short period of time and came back with a wet cloth and 95% came right off. A 2nd application and the remaining came off.