28.81 MPG !!
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Just 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.
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There is no reason for you to be using 91 octane fuel. The calibration is optimized using 87. Try a few tankfuls with "the cheap stuff" and you may actually see an increase in fuel economy beyond what you are seeing now. It is a good idea to keep using the Ethanol free fuel as you will see about 1-2 MPG better than the E10 stuff.
The engine has 10.5:1 compression, so it definitely has the ability to take advantage of 91 Octane with a flash tuner anyway. I'll definitely be looking into this within the next year.
Doug
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It was my understanding that the 3.7 benefits from the same 10hp increase from running 91, as the 5.0 does. The 5.0 is rated at 402hp on 87. They rated it at 412 (on 91) to be closer to the Camaro and Chally, and rated the 3.7 at 305 (on 87) so as to not step on leftover 2010 GT's toes....a 315hp GT doesn't sound very good with a 315hp V6 sitting right next to it getting 7mpg more for about the same price.
I fully expect Ford to up the V6 power rating to 315hp next year, once most of the 2010 inventory is gone.
I fully expect Ford to up the V6 power rating to 315hp next year, once most of the 2010 inventory is gone.
#24
That is good! My 2010 Mustang GT (4.6L/5-speed manual/3:31 axle) would get 28mpg on long highway trips. In mixed driving, it would get 18-20mpg.
My 2011 Mustang GT (5.0L/6-speed auto/3:15 axle) has 2,000 miles on it now and is getting 19-21mpg in mixed city driving. I haven't been on any long highway trips yet to see what the new 5.0 auto will do. I will take this opportunity to also say the 2011 GT is one helluva refined car. Incredible!
My 2011 Mustang GT (5.0L/6-speed auto/3:15 axle) has 2,000 miles on it now and is getting 19-21mpg in mixed city driving. I haven't been on any long highway trips yet to see what the new 5.0 auto will do. I will take this opportunity to also say the 2011 GT is one helluva refined car. Incredible!
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Update ... just refueled this morning ...
computer said 28.1 AVE MPG, but 405.3 MI / 13.759 GAL = 29.46 MPG
More hwy driving on this tank than the 29.10 MPG tank last week, but not as much as a normal work week. Tuesday morning I94 into Chicago was shut down due to a Miller Lite Truck that crashed @ 3:15AM with cases of beer strewn across all 3 lanes. It was still screwed up at 7:30AM when I was on my way in, so I had to get off. Wednesday morning it was raining, so I took side streets again into work ... and because of all the rain & humidity I had the Defrost or A/C on quite a bit too.
Think it could have easily been a 30+ MPG week !!
Doug
computer said 28.1 AVE MPG, but 405.3 MI / 13.759 GAL = 29.46 MPG
More hwy driving on this tank than the 29.10 MPG tank last week, but not as much as a normal work week. Tuesday morning I94 into Chicago was shut down due to a Miller Lite Truck that crashed @ 3:15AM with cases of beer strewn across all 3 lanes. It was still screwed up at 7:30AM when I was on my way in, so I had to get off. Wednesday morning it was raining, so I took side streets again into work ... and because of all the rain & humidity I had the Defrost or A/C on quite a bit too.
Think it could have easily been a 30+ MPG week !!
Doug
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Update ... just refueled this morning ...
computer said 28.1 AVE MPG, but 405.3 MI / 13.759 GAL = 29.46 MPG
More hwy driving on this tank than the 29.10 MPG tank last week, but not as much as a normal work week. Tuesday morning I94 into Chicago was shut down due to a Miller Lite Truck that crashed @ 3:15AM with cases of beer strewn across all 3 lanes. It was still screwed up at 7:30AM when I was on my way in, so I had to get off. Wednesday morning it was raining, so I took side streets again into work ... and because of all the rain & humidity I had the Defrost or A/C on quite a bit too.
Think it could have easily been a 30+ MPG week !!
Doug
computer said 28.1 AVE MPG, but 405.3 MI / 13.759 GAL = 29.46 MPG
More hwy driving on this tank than the 29.10 MPG tank last week, but not as much as a normal work week. Tuesday morning I94 into Chicago was shut down due to a Miller Lite Truck that crashed @ 3:15AM with cases of beer strewn across all 3 lanes. It was still screwed up at 7:30AM when I was on my way in, so I had to get off. Wednesday morning it was raining, so I took side streets again into work ... and because of all the rain & humidity I had the Defrost or A/C on quite a bit too.
Think it could have easily been a 30+ MPG week !!
Doug
#27
Your 3.7 V6 would run door to door with a stock 428CJ and yet gets triple the mileage. Thats amazing.
While my 3.55 Geared 5.0 will never match your 2.73 geared V6 Im very happy so far. You might have something with that G100. My latest tank appears to be hovering around 24.5 mpg City (Info Center reads 22.8 mpg and is usually 7% low).
Of course since I started thinking about mileage Ive been running the AC less and turning off the car when I think Im going to be idling over 30 seconds (per manual) so Im sure that plays into it as well.
While my 3.55 Geared 5.0 will never match your 2.73 geared V6 Im very happy so far. You might have something with that G100. My latest tank appears to be hovering around 24.5 mpg City (Info Center reads 22.8 mpg and is usually 7% low).
Of course since I started thinking about mileage Ive been running the AC less and turning off the car when I think Im going to be idling over 30 seconds (per manual) so Im sure that plays into it as well.
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Your 3.7 V6 would run door to door with a stock 428CJ and yet gets triple the mileage. Thats amazing.
While my 3.55 Geared 5.0 will never match your 2.73 geared V6 Im very happy so far. You might have something with that G100. My latest tank appears to be hovering around 24.5 mpg City (Info Center reads 22.8 mpg and is usually 7% low).
Of course since I started thinking about mileage Ive been running the AC less and turning off the car when I think Im going to be idling over 30 seconds (per manual) so Im sure that plays into it as well.
While my 3.55 Geared 5.0 will never match your 2.73 geared V6 Im very happy so far. You might have something with that G100. My latest tank appears to be hovering around 24.5 mpg City (Info Center reads 22.8 mpg and is usually 7% low).
Of course since I started thinking about mileage Ive been running the AC less and turning off the car when I think Im going to be idling over 30 seconds (per manual) so Im sure that plays into it as well.
I figure an '11 M/T V6 w/ std. 2.73 gears should be able to get in the low to mid 14's if the PP version w/ 3.31 gears did 13.7 @ 102.
I'm sure with a proper tune and the right driver my '69 could do MUCH better than 15.39, but would it really beat this '11 V6 ??
Doug
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Thats some good gas mileage Doug. I checked my gas mileage today. Mine is all in town driving. My 4 cylinder 158 h.p. Dodge (traded for Mustang) got around 22 m.p.g. My Mustang got 23.3 m.p.g. I'm very happy with this, twice the horsepower and getting more miles per gallon than my 4 cylinder trade-in.
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Thought I would post my results from a long drive this weekend. My first tank was about 18-19 MPG but that included a TON of idling and lots of spirited take offs. My second tank (in process) was the start of the 200 mile round trip. I reset the computer and off I went. By the time I was out about 30+ miles, I was at 25 MPG, all highway. Some around-town driving moved it into the 24s. More slow driving behind driver's training failures and it was moving to the 22's. Back onto the highway home and it was averaging 24+ MPG.
Not what I'd call "stellar" for the V6 but it is only the second tank AND I believe the computer is estimating low. I have the 3.31 gears as well. Heading north this weekend for a VERY LONG drive and will check again. If I can get 29 MPG, I'll be happy.
Not what I'd call "stellar" for the V6 but it is only the second tank AND I believe the computer is estimating low. I have the 3.31 gears as well. Heading north this weekend for a VERY LONG drive and will check again. If I can get 29 MPG, I'll be happy.
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No. That doesn't reset the display. With the m.p.g. dispay showing. Go on a long straight road and set your cruise control at around 45 to 50 m.p.h. Push the reset for the m.p.g. read out, you'll see your m.p.g. go way higher. After a couple miles, turn off your cruise control off.....Your done. Doing this gives you a new starting point for your read out m.p.g..............I think i told you the right way......It works for me LOL!!!
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No. That doesn't reset the display. With the m.p.g. dispay showing. Go on a long straight road and set your cruise control at around 45 to 50 m.p.h. Push the reset for the m.p.g. read out, you'll see your m.p.g. go way higher. After a couple miles, turn off your cruise control off.....Your done. Doing this gives you a new starting point for your read out m.p.g..............I think i told you the right way......It works for me LOL!!!
What possible difference could cruise control make?
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Hey, that is impressive gas mileage, ALMOST
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For reference on the computer, I've been tracking it over several tank-fulls, and the computer has always been within a few tenths of the calculated MPG -- sometimes a little high, sometimes a little low, but never off more than 0.5 MPG -- this probably has more to do with the accuracy of the calculation (do you fill the tank up to exactly the same spot every time?) than the computer.
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It just gives you a better starting point. I was stuck at 17 m.p.g. before i re set it using the cruise control. Now i'm showing a more realistic 24 point something on the m.p.g. read out.
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It gives you a nice boosted average to start out with though...