I use the Black Magic engine cleaner stuff and it works fine...of course, it's my dad's car and he never cleans it, so it's still gross, but it's an improvement. I don't run the engine when I do spray it or rinse it, though...why would you?
I use the Black Magic engine cleaner stuff and it works fine...of course, it's my dad's car and he never cleans it, so it's still gross, but it's an improvement. I don't run the engine when I do spray it or rinse it, though...why would you?