Just had a Motorvac fuel system treatment done on my 2002 F150. Made a pretty nice difference from a power standpoint. It peppier and don't have to give it as much throttle now. I just changed the plugs, oil(Used Motorcraft synthetic blend-Opinions on the oil???), cleaned and checked coil boots. Basic tune up stiff. Runs really well right now. Just trying to see if there are any Motorvac fans and how your results were.