Did my 1st normal commute two weeks ago with cruise set @ 75 (65 thru Milwaukee) and driving in 6th as much as I could or RPM's around 12-1500 cruising on city streets but typically spirited accelleration thru the gears from every stop.
Trip consists of 1 round trip to & from home (Two Rivers,WI - Skokie,IL approx. 170 mi ... all but maybe 15 mi. is interstate, and all but 5 miles is 55+), then 2 trips to & from my parents house which is 15 mi from work and 1/2 interstate.
Filled up at the local station with the computer saying 19 mi to E ... with a little over 1k miles total on odo this 404.2 mile trip took 14.032 gals or 28.81 MPG !! She's been on a straight diet of Citgo Ethanol Free 91 Premium since my dealership's courtesy fill of 87 E10 so I don't know if this is helping, but it can't hurt.
Computer ave. fuel economy said 26.9 MPG when I left work the night before and had gotten up to 27.7 MPG when I finally got off the interstate 2.25 hrs later. On the way down to work on Monday, the ave got up to 29.1 MPG.
92.7 miles of City/County road driving last weekend netted me only 21.02 MPG ... compared to the 1st fill up after the prior 2 weekends was 209.6 miles @ 21.97 MPG.
My goal of doing my 400+ mile commute on ONE tank of gas has been achieved. And if the MPG's continue to improve as the engine breaks in further, all the better.
FYI ... I do have the std. 2.73 gears so she purrs under 2k RPM's @ 75 MPH (theoretically s/b 1823 RPM @ 75, but tach reads closer to 2k).
All this out of a 3500 lb vehicle with 235mm wide performance tires that easily barks these tires going into 3rd gear ... both the gear head AND miser in me are just lovin' this new daily driver !!
Just refueled yesterday afternoon for this weeks commute ...
397.1 MI / 13.648 GAL = 29.10 MPG for my 2nd full week commute.
More city driving on this tank than the 28.80 MPG tank, so yes it is definitely still improving with 1500 miles on the odo !!
Doug