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Old 06-26-2006, 11:49 AM   #1
flip326
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EPA gas mileage question

so i take the s2k to San Antonio this weekend.

i drive top up set the cruise at 80mph the whole way. i got 28 mpg

on the way back to houston i drove top down, cruise at 80, with one mile worth of going about 110, and three miles going about 90...and still managed 26.25 mpg

i had a nerdy moment and looked up the EPA estimates which set the car at 26mpg highway going 65mph.....is this a fluke? why did they under-rate the gas mileage that much?

i talked to my uncle about it today, and he said the EPA overestimated his rx8. he's barely got 18mpg cruising at 80 driving up to dallas. EPA states 24mpg highway :confused2
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Old 06-26-2006, 11:55 AM   #2
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I have read on the tests before, but don't remember them exactly. It seems like the highway rating is measured by driving 10 miles in each direction at either 55 mph or 65 mph. (Not sure which.) The resulting gas mileage is multiplied by .85. I don't remember exactly, but I'm too lazy to look it up.
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Old 06-26-2006, 12:05 PM   #3
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it's hard to figure, the epa ask the manuf. for the result. the manuf. set the car up in a labratory to get their mileage. so a lab. is a far cry from the real world. i think they baseline they use is like and avg of 48mpg w/ the AC off.

many odyssey people complain, but we got 26.2 over a 2300mi trip and the epa rating is 28. so we were happy.

also, how full was your tank? unless you see the gas coming out of your filler hole, 1 fillup may have been higher then another. so if you fill up where you can see the gas at 2 diff stations and get the mileage in-between, that can also cause a variance.
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Old 06-26-2006, 12:23 PM   #4
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The way I measure is......

Go to station fill till it clicks off, hang it up

Drive 30-50 miles

Refill, when it clicks look up and see how much you put back in.

Do the math.
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Old 06-26-2006, 02:04 PM   #5
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my car doesn't get good gas mileage doing 80. I have to keep it around 70.
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Old 06-26-2006, 02:08 PM   #6
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Quote:
Originally Posted by Solracer
The way I measure is......

Go to station fill till it clicks off, hang it up

Drive 30-50 miles

Refill, when it clicks look up and see how much you put back in.

Do the math.
thats basically what i did too....


but i made sure to fillup all the way....drive to S.A fill up all the way see the miles on the odo, then divide by whatever gallons showed on the screen...

229.5 miles.....8.306 gallons top up going to S.A 27.63mpg

228.3 miles....8.687 gallons top down coming back to Houston 26.28 mpg
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Old 06-26-2006, 02:12 PM   #7
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Quote:
Originally Posted by Greenway Smokey
my car doesn't get good gas mileage doing 80. I have to keep it around 70.
hey jason...i raced (for some dumb reason) an VW r32 while is was up there. and lost really bad...looked up the specs and he had the same HP, but v6, and AWD.....and i swear i heard turbo spool, so that musta been aftermarket....

but long story short, i got my handed to me from a red light....then again from a 40 punch

oh well....no more racing for me again!!! :laughing6
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Old 06-26-2006, 02:41 PM   #8
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Quote:
Originally Posted by flipboy326
hey jason...i raced (for some dumb reason) an VW r32 while is was up there. and lost really bad...looked up the specs and he had the same HP, but v6, and AWD.....and i swear i heard turbo spool, so that musta been aftermarket....

but long story short, i got my handed to me from a red light....then again from a 40 punch

oh well....no more racing for me again!!! :laughing6

Those r32's have a good lauch since they are AWD. There is a few turbo R32's in SA that i've heard of. MJM autohaus is out there so there should be a lot of performance VWs around there.

Beware of some GTI's in houston. There are a few guys rollin around with close to 400whp. Also quite a few fast jettas around here too.

just look for the FMIC
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Old 06-26-2006, 04:41 PM   #9
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Quote:
Originally Posted by Greenway Smokey
Those r32's have a good lauch since they are AWD. There is a few turbo R32's in SA that i've heard of. MJM autohaus is out there so there should be a lot of performance VWs around there.

Beware of some GTI's in houston. There are a few guys rollin around with close to 400whp. Also quite a few fast jettas around here too.

just look for the FMIC
i didnt get to see the ffront of the car...just a side profile and the the rear :BangHead:
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Old 06-26-2006, 10:19 PM   #10
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your driving conditions probably play a small factor. wind, hills, terrain, etc...
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