The 3 valve engines are much better than the 2 valve engines in terms of power. We have 2010 F150 extended cab SB with the 4.6 3V engine - averages about 19-21 MPG consistantly. That's with every tank of fuel with mixed driving and any yahoo that grabs the keys driving it.
Actally from 2002 on (or so) all the 4.6s with 2V engines have the PI heads (not PE). Much better power than the old 2V engines and with better threads on the spark plug holes.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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