RedXex is an additive "oil" that was pumped into the carburetor, or possibly directly into the cylinder head, in order to get rid off carbon and soot in the combustion chamber of an engine. I have seen pictures where the service men had a pump like this out on the pump island. I have also seen a type of Redex pump that sucks the oil out of a can and into the engine. Redex is mad in Britain. I have a couple of Redex tins and I'll send a picture to Jim to add to this post.
Hope this helps
Claes
Sweden
Edit to make image appear
[This message has been edited by Oldgas (edited 03-08-2002).]