i use it in my diesel ram every time i change the fuel filter, i would fill the fuel filter can with seafoam run the truck for 10 mins shut it off for 1/2 hour or longer then take it for a blast down the highway! keeps the injectors clean and the rest of system, i also use the power service product every time i put fuel in the truck!!!! i use the seafoam in my duster once in a while and when i put it away for the winter. i use it all the time in the lawn mower/snowblowers...i would recomend this to use!!!