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Thread: 70 mph

  1. #1
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    70 mph

    What MPG are you getting at 70 mph?

    Andy



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    Junior Member ioriknight's Avatar
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    I do around 41.7mpg doing 70 on the freeway.

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    I'm also in Minnesota, and regularly drive down I35 at 70mph. I have a manual transmission.

    In the late summer/early fall I was doing about 40-41mpg, with the factory tires. Two weeks ago, with winter tires (aired up to 50psi) and with temperatures at varying between 5 degrees and 20 degrees, I was getting about 38.5mpg.

    Like others have said, the car is great for around town/lower speed highways. I wish there were a higher gear for interstates.

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    Senior Member IchabodCrane's Avatar
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    I'm getting 39 - 44 mpg US with cruise set at 110km/hr (68.35mph) in temp ranging from -5 to -25°C on winter Dunlops with my CVT.

    Added Note: I leave the air cond. in auto mode so it's pretty much always on even in winter.
    Last edited by IchabodCrane; 01-20-2017 at 03:59 PM. Reason: added note
    Will weld for beer.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)


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    I have my tires at 35 psi all around. Still on the stock Enslaves. I average between 39-41 mpg according to the gauge. I usually average about 270ish on a full tank with commute averaging around 70mph. Not bad considering the high amount of traffic going through the cities + the cold weather.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 45.1 mpg (US) ... 19.2 km/L ... 5.2 L/100 km ... 54.1 mpg (Imp)


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    I live in Florida, my tire psi is about 34 and we always have AC on and the tempature is about 80-90f I get 34mpg driving 80mph on the highway and some local driving. 260-270 miles per tank

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    Freeway/Interstate travel is the Mirage's mighty downfall. MPGS plummet due to the idiocy of not having a 6th gear for 70+ cruising. I can document 39-41 mpg at 70+ speeds, 80k miles worth. With a 6th gear, I'm convinced my avg would be a solid 5 mpgs better

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage ES 1.2 manual: 44.4 mpg (US) ... 18.9 km/L ... 5.3 L/100 km ... 53.3 mpg (Imp)


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    Senior Member Top_Fuel's Avatar
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    Quote Originally Posted by wmo168 View Post
    ...I get 34mpg driving 80mph...
    Do you have a CVT or 5-speed? My 5-speed rarely sees over 60mph...lol. I can't imagine this thing at 80. That would have to be around 4,000 RPMs in a 5-speed car?

    Name:  RPM.jpg
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        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 51.6 mpg (US) ... 22.0 km/L ... 4.6 L/100 km ... 62.0 mpg (Imp)


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    Senior Member 25Plus's Avatar
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    What would be the problem with 4000 RPM?

    If you are driving the same gear, the crankhaft will turn exactly the same numbers on a given distance, no matter the speed or RPMs. It´s only a question of the design of the motor, if this would be harmful. It may be better than driving with 800 RPM all the time...
    Mitsubishi Space Star 1.2:
    Daihatsu Cuore L251:

        __________________________________________

        click to view fuel log View my fuel log 2015 Space Star Klassik Kollektion+ 1.2 manual: 67.9 mpg (US) ... 28.9 km/L ... 3.5 L/100 km ... 81.6 mpg (Imp)


  11. #10
    Moderator Eggman's Avatar
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    A taller gear won't overcome the additional aerodynamic drag of increased speed. When it comes to fuel economy, speed kills.


        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.6 mpg (Imp)


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