Has anyone tried any combustion cleaner before? What's the results and what product would you recommend? Thanks

 

I won a package at an event a year or two ago... It contained a bottle of Toyota Combustion & EFI System Cleaner and a Toyota Water Removal Additive. I just gave it to my service advisor during my 60,000 mile service and they added it. I didn't notice any differences between the service... So I guess... Stay OEM?