A diesel pump at the gasoline fuel islands are for autos and pick-up trucks, and also trucks of larger ton capacity ( ie 1 1/2 ton and higher. BUT NOT tractor-trailers) Some gasoline stations have a SEPARATE island for semi fueling, DON'T get fuel there at the truck island. The fuel NOZZLE is of large diam. and will be a problem both, as fitting and fuel flow amount. However, a truck fuel island fuel pump nozzle can control the flow. Just pull nozzle trigger untill "trickle" flow is seen. Anything beyond that, will result in high fuel flow. One thing else. The nozzle does not control pressure, the PUMP, controls fuel pressure. If you use ONLY diesel fuel pumps, at GASOLINE ISLANDS, you won't find "high pressure" problems,
