I use "Charlies Soap"
It worked great on the engine and is safe for paint. It also prety much leaved no residue. Works great on aluminum rims

 

7283-250, where did you get the charlie's soap from? I remember seeing that used on a tv show before, but i forgot all about it. The name sounds familiar to me, but i forgot what it was all about.

Anyway, i didn't get to clean my engine compartment today for the show 2morrow, And if you read this thread (https://www.f150online.com/forums/sh...threadid=80770) you'll find out why

 

the web site is http://www.charliesoap.com/
you have to call or email them. It's not sold in stores