Folks don't use MMO in your fuel system.
It is not proven to do anything by certified tests, and most car makers specifically tell you NOT to use thing kind of stuff.
If you need to do anything to clean your fuel system use an APPROVED DETERGENT cleaner like Techron Concentrated, Red Line LS1 or 3M Concentrated cleaners.
They all have manufacturer approved PEA detergent in high quantitues that are proven to remove tough cabron deposits and are completely safe and will not damage fuel system plastics or rubber.
It is not proven to do anything by certified tests, and most car makers specifically tell you NOT to use thing kind of stuff.
If you need to do anything to clean your fuel system use an APPROVED DETERGENT cleaner like Techron Concentrated, Red Line LS1 or 3M Concentrated cleaners.
They all have manufacturer approved PEA detergent in high quantitues that are proven to remove tough cabron deposits and are completely safe and will not damage fuel system plastics or rubber.