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c5 automatic-specific mpg question

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Old Sep 5, 2008 | 09:57 PM
  #1  
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Default c5 automatic-specific mpg question

I know the manuals can get 30+ on the highway on long trips, and maybe 22-24 in the city with easy driving...

how are the automatic C5s (im mainly looking at 98/99 vettes) ? are the numbers close to the manuals with easy driving? im usually cruising along at 80mph on the freeway

also, do coupes and convertibles make a difference as far as mpg (assuming the top is closed)

thanks!
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Old Sep 5, 2008 | 10:02 PM
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I have a 99 with the 3.15 rear end.
I get 28-29 highway at 75 mph average and 20-22-ish city at 35-45 mph city driving
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Old Sep 5, 2008 | 10:09 PM
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My 04, with 3.15 rear gets 27 mpg at 75ish mph highway and 19 mpg in town.
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Old Sep 5, 2008 | 10:16 PM
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I have a 1998 coupe, coming back from Denver 941 miles ave 28mpg. Drove 80 in Col. and Neb. 75 in Iowa and 70 in IL. 5 over, with air on most of time. Last tank some expressway and most in town. Ave 22 mpg. Keep foot out and it does good. If you can go 65 = 29+ to 30.3
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Old Sep 5, 2008 | 10:26 PM
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Originally Posted by fireman591
I have a 99 with the 3.15 rear end.
I get 28-29 highway at 75 mph average and 20-22-ish city at 35-45 mph city driving

Same here.
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Old Sep 5, 2008 | 10:33 PM
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I have an A4 with 3.15 gears and have gotten over 30 MPG at a steady 60 mph pace. I typically get 19-21 MPG in my daily commute (which includes some real brutal rush hour traffic in Toronto)
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Old Sep 5, 2008 | 10:36 PM
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98 coupe with 140k miles. 3.42's and a Yank SY3500.

28-29mpg on the highway cruising mainly around 70-75mph.
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Old Sep 5, 2008 | 10:39 PM
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a 2800 mile round trip thru OK, TX, NM, and CO, crossed the continental divide twice, got 28.8 by the old fashion way, miles divided by gallons not DIC. 3.15s
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Old Sep 5, 2008 | 10:40 PM
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good numbers. civic/accord/camry numbers lol
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Old Sep 5, 2008 | 10:52 PM
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2002 Z51 coupe, A4, 3:15 rear end: consistent 21 on my city cycle of duty with 28 at 75 mph average on highway.

Lots less if I keep my foot in it.

Best fuel economy of all the cars in the family!

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Old Sep 5, 2008 | 10:58 PM
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I have an 04 ls 1 and at 80-85 hiway around 23.3 over all
the chuckster
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Old Sep 5, 2008 | 11:35 PM
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I have a 97 auto as long as I keep my foot out of it I get 27-28 on the highway around 60 to 65 mph
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Old Sep 5, 2008 | 11:38 PM
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Default Denver to DFW

I drove my 98 A4 from Denver to DFW in July. Kept it "around" the posted limit and got 31 mpg for the 900 mile trip.
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Old Sep 5, 2008 | 11:45 PM
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I have a 2000 coupe and I usually average 29-30 mpg on the highway. I did manage 32mpg going from Kansas to DC a couple of years ago.
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Old Sep 5, 2008 | 11:53 PM
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I have a 2000C5 Auto and I get 15mpg
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Old Sep 5, 2008 | 11:54 PM
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02, automatic, stock, 17K miles. Seattle, WA to Carmel, CA and back -- 2-lane Hwy 1 along the coast southbound, San Francisco gridlock for two days, cruising for meals and side trips, and I-5 northbound at 70+mph = 29.4mpg. (About the same as the wife's Honda Accord, 4cyl, 6-speed.)
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Old Sep 5, 2008 | 11:55 PM
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Default Gas Mileage

Originally Posted by fireman591
I have a 99 with the 3.15 rear end.
I get 28-29 highway at 75 mph average and 20-22-ish city at 35-45 mph city driving
Hi, 03 vert, auto, 315's, tires @ 29psi, same as above. Have seen 31mpg on long trips averaging about 70mph. Seems that Shell gives me the best MPG. I measure from tank to tank, the dic is misleading.
Good Luck

Last edited by bestvettever; Sep 5, 2008 at 11:57 PM.
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To c5 automatic-specific mpg question

Old Sep 6, 2008 | 12:29 AM
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Search really can be your friend! There was a thread about this very subject yesterday!
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Old Sep 6, 2008 | 12:49 AM
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Between 15-16 city and 28-29 highway
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Old Sep 6, 2008 | 01:08 AM
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My '04 CE A4 Coupe is averaging about 20 around town. According to the DIC, I've been getting a steady 31 - 32 MPG at 55 - 60 on a level stretch of pavement. On the interstate, she gets a steady 27 - 28 at 70 - 75 MPH, at 85 MPH, the fuel consumption goes up and the numbers drop to about 25 - 26 MPG. Real world calculations bear these DIC number up, so the computer's pretty accurate!
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