[Formerly Steve Wilkinson]

I have PMOs on a 3.35-liter twin-plug SC and get from 13 to 17 mpg in typical sporty but definitely not crazed rural driving. My absolute best all-highway, trip-to-the-Glen mileage was 19.

As for PMOs versus Webers, one major advantage is the utter completeness of the PMO kit. I replaced CIS (obviously) with the PMOs and every last thing I needed to do so, and to do so as a total amateur, was in the PMO kit.

They are _very_ simple to tune. At worst, you'll need a couple of dyno runs by a pro (Rick DeMan of Nyack, New York in my case) to lock down the basic jetting parameters, and you probably won't ever have to touch anything again, but if you do, PMO's instructions are crystal-clear. PMO is also there to respond and help. ("Mister Weber, can you hear me now?")