Quote Originally Posted by patopig
When doing the engine, do I have to use simple green full strength or ok lang dilute to 1:1?
I have nevered used SG full-strength. Your dilution will depend on how dirty your engine bay is. If it's really grime city, then 1:2 or 1:3 will do wonders. The trick is to spray it on the dirty, oil, greasy area, let it stand for 3 to 5 minutes, then agitate with a paint brush. Thereafter, if you do regular engine detailing, then you can experiment with anything from 1:6 to 1:10. I know of some guys who are happy with one part SG and ten parts water (1:10).