Just by the correct filters from the DeLorean Suppliers. When I got a tank of bad gas from a major petroleum company, I drained the tank and put in a new filter. I was trying to prevent any fuel injection parts from going bad. I had just replaced the entire fuel injection system. I purchased the PUROLATER fuel filter from an auto parts supply store. The bottom of the filter, where the "L" shaped fitting attaches from the fuel line was too short. The British car technician that was trying to help me cut the "L" fitting down a couple of threads to help me get home. I recently shipped the car to a renown DeLorean Service Facility. Their staff informed me that they put on the correct filter and replaced the "L" shaped fitting. In addition to that, they replaced the rubber fuel line...they are VERY OLD and could burst setting the engine on fire. There was a picture in a recent DeLorean World (1999) that feature what happened to a fellow DMC owner in Florida. {The DOA is worth its value in membership} Senator