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Ever since I started having to use the A/C here in Washington, DC my average MPG (in stop & go city driving, 5spd) has dropped from mid to high 50's to the mid 40's and sometimes lower. I have lost an average of about 10 MPG because of the A/C, even with Econ on. Is this about the size of the MPG hit that others have experienced once the summer starts? This is my first summer with the Insight.
 
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humid heat

I feel for you. In the middle 80's I lived in Baltimore and drove a VW diesel without A/C. No A/C was truly miserable. I wouldn't worry about the low 40's mpg, its still better than other airconditioned cars, but I'd use the A/C. Sorry can't tell you what the A/C hit is on the Insight, mine does not have A/C, and I avoid the route with the stoplights on HOT days, but the MPG seems to be higher on 100 degree days with the windows down than 70 degree days with the windows up.

03 MT no A/C
barefoot driven
shoes too big
 

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Try setting thermostat to 78*

Try setting thermostat to 78* :D

My mpg drops about 3 mpg w/ a/c on [70 mpg -> 67 mpg]. However, my commute is predominantly highway driving and Sacramento heat is much dryer than DC heat.
 

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Shifting 1st , 2nd -> 5th

Try shifting 1st , 2nd -> 5th. You'll get better gas mileage w/ or w/o ac econ on. Of course, you won't be able to zip around.
 

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Re: Shifting 1st , 2nd -> 5th

mjrogers said:
Try shifting 1st , 2nd -> 5th. You'll get better gas mileage w/ or w/o ac econ on. Of course, you won't be able to zip around.
That depends on how long you stay in second... 8)
 
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