Most fuel efficient speed?

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Mar 27, 2008 | 05:46 PM

CPapin

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From: Edmond Oklahoma

Most fuel efficient speed?

In the days of rising gas prices there are tons of articles about "how to conserve gas." Many suggest driving at 60 MPH because it is "the most fuel efficient" speed. I realize this is a general statement and does not apply to all, but it made me think, "what is the most fuel efficient speed for the C5?"

Any support out there other than the instant MPG in the dash?

CCP

Mar 27, 2008 | 05:49 PM

WKMCD

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From: Haymarket VA

My engine is most efficient at about 80MPH. Has to do with the cam, etc.

Mar 27, 2008 | 05:51 PM

AU N EGL

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From: Raleigh / Rolesville NC

same here about 80-82 mph. 6th gear ~ 31-32 mpg

Mar 27, 2008 | 06:00 PM

jserio

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From: Garden Grove Ca

I am also incline to agree on that 80 mph as well. I also averaged 30 mpg's in the flat areas. Gotta love this car.

Mar 27, 2008 | 06:11 PM

AC54ME

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From: Plano Texas

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Engine off - Vette in garage = best mileage

Mar 27, 2008 | 06:35 PM

corvette-pilot

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From: Hanger 18 Taxachusetts

Quote:

Originally Posted by AC54ME

Engine off - Vette in garage = best mileage

That's only 0 mpg, that ain't so good

Mar 27, 2008 | 06:45 PM

AC54ME

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Quote:

Originally Posted by corvette-pilot

That's only 0 mpg, that ain't so good

Yes, but 0 MPG cost $0.00

Mar 27, 2008 | 06:46 PM

damilleniumboy

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From: LAND OF OZ Kansas

Quote:

Originally Posted by AC54ME

Yes, but 0 MPG cost $0.00

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Mar 27, 2008 | 06:46 PM

jacks996

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From: eagle mountain lake tx

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when my car was stock it would get 30 mpg at 80 mph

Mar 27, 2008 | 06:47 PM

#10

ericdwong

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From: Baltimore suburbs Maryland

well on a stock car, I think 55-60 is the most fuel efficient speed.

Mar 27, 2008 | 06:49 PM

#11

The Wanderer

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From: (Temporarily) Colorado Springs Colorado

Quote:

Originally Posted by AU N EGL

same here about 80-82 mph. 6th gear ~ 31-32 mpg

I set my cruise at 81 and sip 30 miles out of a gallon of gas consistently in 6th.

Mar 27, 2008 | 06:55 PM

#12

corvette-pilot

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From: Hanger 18 Taxachusetts

Quote:

Originally Posted by AC54ME

Yes, but 0 MPG cost $0.00

True but you wont get very far very fast.
I'd rather get 5mpg and drive 20 miles to work ($4 in 20 minutes)
vs
walking 20 miles to work ($50 new Nike's - several hours)

but that's just me

Mar 27, 2008 | 06:56 PM

#13

Lancer033

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From: Norfolk VA

last time i took a trip in mine, I stuck to the speed limits (2 tickets in 6 months, going through South Carolina) and in addition to being board out of my mind and making crappy time, my MPG dropped to 29mpg. I've normally kept it to about 10-15 over the limit and gotten 31-32mpg, so that supports the 80mph too.

Mar 27, 2008 | 06:57 PM

#14

noahdr

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From: New Bern NC

I wonder what it is for auto's? Different gear ratios should have a different speed/mpg.

Mar 27, 2008 | 07:07 PM

#15

Dave64

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From: Avondale Arizona

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This past weekend, we traveled from Phoenix to LA and back in my bone stock '02 A4 w/2:73 gears. There were two of us with our luggage, tires at 35 psi hot, A/C on and running 77-79mph. The car tells me it averaged 27.8 mpg. Those hills east of Palm Springs are killer on the mileage. BTW, I'm sure glad I don't have to buy gas in LA all the time.

Dave

Mar 27, 2008 | 07:12 PM

#16

The Wanderer

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From: (Temporarily) Colorado Springs Colorado

Quote:

Originally Posted by corvette-pilot

vs
walking 20 miles to work ($50 new Nike's - several hours)

but that's just me

---------------------------------------------
Reminds me of the NASCAR commercial with the kid that changes his right side shoe

Mar 27, 2008 | 07:24 PM

#17

Tikiman12

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From: Delray Beach Florida

i have an a4, stock rear. with full intake and headers back. i get 33mpg at 68mph. but i usually go about 70-75 and between there i make 30-29mpg

Mar 27, 2008 | 07:49 PM

#18

istsme98

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From: york pa

Quote:

Originally Posted by AC54ME

Engine off - Vette in garage = best mileage

Mar 27, 2008 | 08:02 PM

#19

ScottJ97

Instructor

Joined: Feb 2007

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From: San Francisco CA

At 25 mph in 5th gear (idle cruise) the DIC says 40+ mpg.

I've never driven long enough at that speed to know how accurate the DIC is, but I'm pretty sure 80 mph is not the most fuel-efficient speed!

I would think idle in 6th would be best... which is about 40 mph or so.