MPG adjustment over 60mph?
07-16-2008, 09:14 PM
#1
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MPG adjustment over 60mph?
Hey guys, I was wondering if anybody uses one of those MPG calculators to find out their instant miles per galon... Reason being - I am wondering how much my mileage decreases past say 60 or 70 miles per hour.
I have a 95 Civic 1.6L VTEC and I drove about 80 mph average for about 60 miles today, but my fuel gauge isn't all that accurate. I just want to know how much my fuel economy decreases when i do that - and since mine is ODB1 I can't fit one of those nice fancy MPG calculators to it.
Thanks guys!
I have a 95 Civic 1.6L VTEC and I drove about 80 mph average for about 60 miles today, but my fuel gauge isn't all that accurate. I just want to know how much my fuel economy decreases when i do that - and since mine is ODB1 I can't fit one of those nice fancy MPG calculators to it.
Thanks guys!
07-17-2008, 11:13 AM
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http://www.gassavers.com register there and they'll help you out i have the same screen name on there.
07-17-2008, 11:40 AM
#5
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Re: (93dagsr)
It decreases by a lot. Aerodynamic resistance increases with the square of speed. The slower you can go, really, the better. 55 mph on the highway will net you killer mpg if your car is mechanically sound.
Tires inflated properly (or higher)
Alignment zeroed
Brakes not dragging
Wheel bearings in good shape
Good compression
Clean plugs, ignition components
Any Civic should get at least 45+ mpg in these conditions.
A simple way to test aero resistance is to throw it in neutral at a given speed and see how quickly you lose speed. Far, far slower at 55 than at 80.
From my experiences in the Insight, you lose 10-15% mpg for each extra 10 mph. I see 80-90 mpg at 50-55 mph, 70 mpg at 65-70, and 50-55 mpg at 80.
Tires inflated properly (or higher)
Alignment zeroed
Brakes not dragging
Wheel bearings in good shape
Good compression
Clean plugs, ignition components
Any Civic should get at least 45+ mpg in these conditions.
A simple way to test aero resistance is to throw it in neutral at a given speed and see how quickly you lose speed. Far, far slower at 55 than at 80.
From my experiences in the Insight, you lose 10-15% mpg for each extra 10 mph. I see 80-90 mpg at 50-55 mph, 70 mpg at 65-70, and 50-55 mpg at 80.
07-17-2008, 12:00 PM
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Re: (shifty35)
gas milage is also involved with how fast you take off and if you do more coasting to a stop then staying on the gas and having to switch right to the brake hard to stop it!
taking off slow and easy helps. and another minor thing ive heard that can help is a clean waxed car... which in theory its there..... a smooth surface should offer less wind drag. but i dont see it helping to much.
at least not enough to wash my car every day or even once a week. i just kinda eat the MPG loss and just go faster and run the AC as well as pushing the gas hard on take offs. stupid automatic is slow anyways.LOL
still MPG beats the hell outta my old truck i had!!!!!
taking off slow and easy helps. and another minor thing ive heard that can help is a clean waxed car... which in theory its there..... a smooth surface should offer less wind drag. but i dont see it helping to much.
at least not enough to wash my car every day or even once a week. i just kinda eat the MPG loss and just go faster and run the AC as well as pushing the gas hard on take offs. stupid automatic is slow anyways.LOLstill MPG beats the hell outta my old truck i had!!!!!
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