Technical What are you cleaning your engine with?

I have cast aluminum parts as do most of you all on your cars. What is everyone using to clean them but not take the "old" off of them.

 

I like motorcycle washes, like S-100 and HDs cleaner. Gary

 

Pine-Sol or Simple Green

 

good old hot water from a steam cleaner , will not mess up aluminum . and on semis we had alot of polished stuff we didn't want to turn white . a little dawn and I mean little Dawn dish soap in the soap dispenser will take the oil film off without bleaching the aluminum . and when I mean a little like 1 table spoon per gallon of dilute otherwise you have a foam fight

 

Soap and water. HRP

 

Tide was always recommended by a lot of engine builders.

 

Simple Green makes an aircraft cleaner that will not etch aluminum.