I avoid most of the various additives on the market. Most quality gasolines have additives that help keep injectors clean already. The one exception to that is Chevron Techron. I ran into this stuff when I was running a Ford Probe that had a Mazda V-6 engine that was prone to combustion chamber deposits. Techron was the only additive that kept it clean. At the time I lived in Illinois where Chevron gas isn't available, so I bought the Techron Concentrate additive at AutoZone and put it in the tank about every 5th fill or so. Never a problem after that. Here in Utah I just run Chevron gas in the DeLorean. I have to figure that there is something to Techron since the Big 3 automakers actually truck Chevron gas from Kentucky to Detroit so that the can run it for EPA testing. See the link below for that: http://www.chevron.com/prodserv/fuels/techrongas/ Just my $.02. Mark N VIN 6820 At 07:34 PM 9/15/2003 -0000, you wrote: >3M makes a fuel injector cleaner that is supposed work great. Has >anyone on the DML run fuel system cleaners through their systems? >What were the results?