I don't know if that kind of apparatus to do the same kind of good as an off the car service. i am almost certain that one (or more) of my injectors is leaking fuel, as my oil is getting diluted enough by 2000 miles to reduce fuel economy about 1 mpg. it is always possible that it could be the FPR, but it doesn't really look like that to me. i don't have the time to take the car off-line to send my injectors away. thanks.