If you are talking about your tire pressures then yes you will get less MPG with a lower pressure as more tread will be touching the road and that equates to more resistance, however the less tread touching the road means your braking won't be as good, having a higher tire pressure will also wear out your tires quicker, you will also use more petrol if you have your AC turned on,
Testimonial: "Thanks for the info. Yes I dont have the a/c on or the fan at all to try and help with fuel."
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I have been given lots of advice about how to drive my automatic more economically. Most recently on here from geoff. I have been following his advice but so far no change re consumption. I dont accelerate, I hold my accelerator pedal at 1/3 or less and let the car increase at its own pace and make its way up through gears. (My patience is fine at doing this, its the people behind me I'm worried about!) No harsh braking, assessing ahead situs and allowing the car to slow on its own as much as possible.
driver habits
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