| I've been practicing for the last few months. My commute is 260 miles round trip all on freeway/highway. By using the cruise control to stick below 2650 RPMs in 5th(the EGR closing point), and not braking, I managed 27.1 MPG on my last tank. By the odometer, it came out to 28.5 MPG, but I'm about 5% too short in the gearing, so you have to factor that in. This all done with 4.10s and much wider than stock tires. I've been playing with this for a few months now and have noticed that the EGR plays a very big roll in fuel economy. When I drive exactly the same but at 65 MPH vs 63, the mileage drops dramatically to about 24.5. I have the EGR vacuum line split so that it goes both to the EGR and the stock boost guage. This way I can actually watch when the EGR valve opens and closes. As long as I hold below 2650 RPMs, it stays open all the time on flat and slight uphilsl. Driving at 75 MPH without braking and no hard accelleration, the mileage is much closer to 23 MPG. Prior to that, with my aggressive driving habits, I was only getting 21 or so on the same commute. That's about a 29% increase. I suspect going slower and using pulse and glide techniques could probably get more, but that would accelerate wear on the clutch and transmission since I'd constantly be gliding with the clutch in. For now, I'll stick to standard hypermiling techniques. Still with where the price of gas is going, even 27 doesn't cut it, so I'm selling everything and getting a few Prius's and a motorcycle(again). Waiting to see if the 2009 Prius MPG rumors are true.
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22:28:49 05/07/08
