I get better mpg at 65 mph than 60 on my 99 Grand Caravan Sport. My 99 HX M/T seems to get the same mpg at 65 and 70 mph too.
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the odd thing is the only way i can go faster is to depress the gas pedal further, which would seen to indicate more use of gas, and a corresponding decrease in gas millage. i think airplanes get better millage just on the other side of the speed of sound, mayby it has something do do with that? huh.
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Taken to an extreme, you could idle along at 5 or 10 mph, using the least fuel your engine can use while still running, but you'll probably get better mileage at 30mph. |
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1st 15mph headwind is considerable
2nd averages do not represent the same route with speed as the only variable. test is inconclusive. |
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speed (mi/h)/volumetric fuel flow rate (gal/h)= mi/gal If you think about it a little bit, it makes sense. Lets say for the sake of argument that your car burns .5 gal/h at 2200 rpm. If you compare lower speed (i.e. 2200 rpm in low gear) with high speed (2200 rpm in high gear) you will see that the mileage is impacted pretty significantly. Which also makes it easy to see if you can maximize the time your engine is idling (using little fuel) while simulatenously maximizing distance travelled, P&G is a great way to improve mileage. |
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it is really: speed (mi/h)/volumetric fuel flow rate (gal/h)= mi/gal |
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