You need a chemical for engine stuff. I have 4 to try, EcoClean by Duo (that's a Tassie company that sells Wynns), Purple Power, and two others that names elude me right now. I am going for a 1:20 mix to start with. Thats about 600ml to 12000ml. There are specialist products to try as well. a lot of people in the US use "Simple Green" industrial range, which is distributed by Blackwoods. Most of these chemicals are between $80 - $200 for a 20/25L drum. So hopefully in the next weeks I will be able to put together some forumlas for anyone interested.
