Great freeway gas mileage for V6?

Discussion in '2005 - 2014 Specific V6 Tech' started by Ganton, Apr 7, 2009.


  1. Ganton

    Ganton Founding Member

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    Went on a 122.6 mile freeway trip yesterday in our '06 V6 convert. Speed was held steady at 60 mph on cruise control. Used 4.027 gals. Filled up at the same station and same pump on return as when we went down. Cut return trip fill-up off at first click just as on initial fill-up. Made sure tire pressure was up to recommended specs. all the way around. Only mods I have is a K&N drop in air filter and the Flowmaster Am. Thunder single exhaust made espec. for this V6. Mileage came out to 30.44 mpg. Was I ever pleasantly surprised. I had heard that you can get 29 mpg highway with this car and this engine if you kept the speed reasonable, but the 30.4 was beyond my expectations. Could it be the freer flowing intake and exhaust with those two mods?
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  2. The Fang

    The Fang Member

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    I'll tell you how to make it better. Drop down to a half tank or less then drop your speed to 54. Being a vert probably put the top up to cut down on drag or not use the cruise but no ac. you should gain another 4 or 5 more. Have the wife lay off the cheese doodles if need be. :)
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  3. Riggs

    Riggs Member

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    When I drove from Jersey to Virginia about 360 miles going down I got 26.5 mpg, without trying to get good mileage and coming back I got 28 mpg and that was staying at a steady speed of 65 mph. I have never gotten 30 mpg but I am sure it is possible. I just wonder if doing a Zabteck throttle body would help without getting my tune changed.
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  4. 69mach1-409

    69mach1-409 Member

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    Sweet!

    I'm not a six'er, but I've seen just north of 29mpg on a trip from South Jersey to Ohio, but most of the time my Hwy avg is around 26-27mpg.
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  5. Ganton

    Ganton Founding Member

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    Hey, that's REALLY Great for a V-8! About how fast were you driving on the So. Jersey to Ohio trip?
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  6. 69mach1-409

    69mach1-409 Member

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    We were running about 4mph over the limit with only one stop for food & fuel.
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  7. Ganton

    Ganton Founding Member

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    What was the speed limit there, 60?
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  8. 69mach1-409

    69mach1-409 Member

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    The majority of it was 65, though there are a few spots that go as low as 50.

    *Mods at the time: C&L 'Street", Tillman Speed Dyno Tune, Borla Axle Back, and GT500 wheels/tires (speed corrected and matched with the Pioneer GPS HU). No other mods I had at the time would effect mpg*
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  9. Ganton

    Ganton Founding Member

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    Well, that's still really good mileage for the V-8, IMHO...Makes me want to seriously consider going back to the V-8 again if I get a 2010 or 2011 'stang. :D
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  10. Mustang09er

    Mustang09er New Member

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    I know that since I've gotten my mustang last December with 12 miles on it, I now have right under 8000 miles on it and including in town and highway driving (mostly highway) I've gotten amazing mileage, my average even with romping on it and having fun with it most of the time is still 23 average MPG for over 7900 miles so that's still not bad and I'm planning on putting cold air and exhaust so it's only gonna get better, my last mustang was a 2000 GT and I'm in love with the V6 and glad to be doing something different.
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  11. echo7

    echo7 Member

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    I got 25mpg on a 150mile round trip on a freeway, however, I was cursing 75+mph for the majority of the trip. On the way down, I was plowing straight into a 10-20mph wind : / Died down a little on the way back, but still helped. At one point on the way back I also kicked it up to 110 for a little bit :D
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  12. Tupperware

    Tupperware New Member

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    I made a trip home to Ohio with the stang recently. highway speed at around 70 to 75mph.

    32.4mpg

    Have duals and an intake, I assume that had something to do with it. Before the intake was installed, the highest I'd seen was around 30.
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  13. Yomofoitzjay

    Yomofoitzjay Banned

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    u guys are lucky, i don't think i could ever get better than 20mpg.
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