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Chevrolet Corvette Gas Mileage
hi all! what is your average gas mil. on yr Vette out there? On paper, it says 28 hgwy, but i highly doubt it. This means, the Vette is more gas-efficient than the Z or even the new G35 sedan :confuse: :confuse: Please advise. Thanks
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Base model/motor with 6 speed automatic. Car had about 2,000 miles on it.
People have reported over 30 when driven conservatively at 60-65.
I took my first long trip in the Corvette over last Thanksgiving. Northeast of Atlanta ( Duluth ) to Carrabelle, FL – and back.
Trip: Approx. 725 miles, mostly over 2 travel days.
Average MPG = 28.25 ( Excel & DIC nearly identical )
My 2005 Grand Prix GXP ( 5.3L V8, 3600#, DoD 4-speed automatic) when well broken in managed approx. 24 MPG, on exactly the same trip and time of year, with essentially the same load & road conditions.
This trip even included a couple of ‘demonstration’ acceleration runs: 15 MPH to 95 or so. NOT exactly the best conditions for fuel economy . . .
Interesting – particularly given that the GXP’s Highway estimate is exactly the same as the C6 automatic – GXP is 18 \ 27 vs C6 = 17 \ 27.
The one time I have had an opportunity to try for maximum, steady state MPG under near ideal conditions was on this trip to Florida.
On a deserted stretch of Fla. 319 between Sopchoppy ( no, I am not making up that name ) and Lanark Village. Nearly level ( only a few feet above Gulf level ) and generally straight, almost no traffic & with only a few gentle curves. I tried several steady speeds. At 60 to 65 – 70 MPH, on cruise control, once the set speed was established - the instant MPG display would quickly stabilize at 32 ( plus or minus 1 ) I did not dare trying any higher speeds, as this is a rural 2 lane road & often patrolled.
Conditions: Roughly 60 degrees & clear – A/C off.
Car 2007 C6 Coupe A6
- Ray
Happy with that fuel efficiency!
Z06 here, and I routinely get 27+ at 70-80 mph.
Followed my sons towing a race car on a trailer to Michigan (interstates), average about 60mph---got 32+ mpg.
I DO drive an economy car!
little advantage in MPG. I've gotten 30mpg on the DIC going from Fernley, NV back to the SF bay area, now admittedly that is a lot of down hill but I wasn't going slow either. Best mileage using the calc and refills was 28.5 for a 500 mile round trip out to Yosemite and back. Then again I get around 7mpg when I go on track. My local average DIC is usually 22/24 with both freeway and local streets, gosh, sitting at lights will kill mileage.
Randy
is probably going to cut it by almost 2mpg based on what I
see.
I had to laugh at that one...I thought the same thing just idleing while getting out to get the mail from the mailbox. After I got back in the car a couple minutes later, the DIC dropped a half a mile per gallon average....
My 2004 Z06 seems to get a tad less than you folks have described here on the freeway. I'm running 32PSI in the tires, too.
On a recent trip to Vegas from the LA area, I averaged 27 on the way there vs 27.7 on the way back, doing 70 to 80 MPH. The ambient temperature on the way back was from 95 to 60 degrees, with a slight headwind leaving Vegas.
Since there wasn't anything else to do but watch the rear-view mirror and the other poor guys being pulled over by the CHP, I started experimenting w/ trying to maximize the mileage. The difference on the way back could be attributed to running in neutral on the down-hill sections to see what that might do.
All in all, it's one fine economy car!!!
(I should add that the A/C was on most of the time, although I even experimented w/ turning that off on the steepest up-hill sections, too.)
Tires just all aired up to 33 psi and a new air filter. Can you say economy car!
to do amazing things. In my stock engine C5 coupe at 1500
rpm I'm doing just below 70mph and gettin just over 30mpg.
Yesterday I drove two hours to Thunderhill Raceway (137miles)
and got 31mpg on the tank I left with when filling up at the
last station before the track. I then got about 7.5mpg for
the 100+ track miles I did and again got 30+ on the way home.
What I've read, you are going to get significant wear in the center of the tires if you constantly run this high a pressure.
The recommended 30 is better.
Oh, and I recently set a new record for my car. In the southern Colorado mountains, from Durango north at speeds of about 45mph, for about half a tank, I got 33mpg! Another half tank on the trip gave 32mph. No AC, much of this was downhill out of the mountains.
higher pressure at the track to combat side wall roll over,
but on the road I run down to 28 cold and still get extra
center line wear. This is usually offset by the extra wear
on the edges I get at the track.
More mileage while wearing out $1500 tire sets is probably
not a paying option.
down. Problem with that is how long a trip takes. Now I
don't mind a few extra minutes locally when I plan for it,
but on a long trip it can makes hours of difference. Ten
miles per hour for a 7 hour trip puts you in about an hour
earlier and if that costs 2 mpg, then it's under $10 cost.
That is one of the cheaper hours I'll ever get.
Randy
I've been staying away from 8 cyl engines because for me - gas mileage is a big
consideration. I want to put miles on a car but don't have unlimited funds for gas.
Why would a vette have better mileage than a G35, Z, & many other 6 cyl cars?
Are the gas mileage results that anyone is getting calculated by the car's
computer - or by manual calculation?
(How does the car gas mileage calculator work?).
With the gas mileage that people are getting, maybe I'll take my civic si money
& put it towards a vette (now - how about insurance costs)
City driving & ( many ) bursts of WOT will absolutely result in poor fuel mileage.
Although the DIC in my Corvette has proven quite accurate, my calculations and posted MPG are always the result of plugging actual miles & actual gallons into Excel. Overall average right now ( after over 20,000 miles ) on my 2007 A6 Coupe stands at: 21.8 MPG And that includes a generous portion of stop \ slow traffic driving each week – commuting in & out of MidTown Atlanta.
My best full tank was with my Daughter & long weekend luggage in the car on a drive from near Atlanta to the Gulf Coast \ Panhandle of Florida and back: 29.04 MPG and 467 miles.
Regarding insurance – my Corvette ( Daily Driver & approx. 15,000 miles per year ) actually costs me about $25/year ** LESS ** than my previous car – a Grand Prix GXP ) . . .
Good luck.
- Ray
Never expecting Civic SI city MPG . . .
will get better mileage than the auto, which has two rear end ratios. One is pretty
good for mileage and the other is not very good in the auto. This is for C5's but is
probably close for the c6 as well. My best trip was close to 30mpg from Fernley,
NV to the SF bay area, which of course has lots of down hill
and paper calc. Mileage drops off as you start to push past 70mph, as would be
expected.
Randy
I get 25 to 27 MPG on the highway at speeds of 70-80.
I get 20 to 22 MPG in mixed driving.
ECU's that register the grade of the fuel burning and when they get the news
that the octane is down, they just detune the car to run with less zip. Not
bad for the engine or anything. You just aren't getting the same performance
you would get with 91 or higher grade. Then again, for fun you can add 100
octane unleaded at the track to top up the tank, about 1/4 tank to average up
to 93 octane or 1/2 tank to get just past 95 octane, it does make a difference.
Just make sure you never get to the leaded race gas, expensive to replace
the cat's.
Randy
I traded it in for a 2003 Corvette convert with a 6 speed, the only downside is that it is not a winter car like the pontiac could be with FWD but I love the power and better gas mileage that I get with the Corvette and since I can use my wifes 2009 Pontiac Vibe with AWD I let the Corvette hibernate for a few months and I will drive the Corvette from March until November (weather permitting) I love the trunk room I get with the Corvette even with the top down, the pontiac has no trunk room with the top down and only the back seat for storage this was a good trade.
I realize that I may have had some premium gas in the tank when I filled it with the mid grade so I am going to experiment after I awaken my car from hibernation and begin using midgrade and then going down to 87 octane just to see what develops.
I believe that no damage can happen to the car unless you get your gas in a foreign country.
I tried 87 octane gas in a Pontiac Solstice with the turbocharged engine and it still worked well but if your car usually uses Premium gas because of the power you will lose a little power by dropping the grades but if you drive in city traffic a lot you will hardly notice the difference.
I am 68 years old and hope that I can continue to enjoy this car for many years to come, I told my 34 year old son to be nice to me and he may get this Corvette someday and I know he loves the car.
The gas mileage is very good and the power of this car is awesome at least my wife tells me this when I take her for drives.
I really wish that I didn't wait so long to buy a 'Vette but mortgages,children,etc got in the way so I can see why GM says the Corvette was aimed at the 55+ year old crowd.
There is a warning that if you try to go into 2nd gear at low rpm's you may damage the transmission although as long as your rpm's are high enough as in competition you can go through all 6 gears without a problem.
In most city driving I find that unless I really need the smoking takeoff the shift to 4th gear places me in the gear that is best suited for city driving.
I wonder if defeating that feature might cause some problems down the road?
I think you just pull a plug off the tranny and plug a little gizmo into the connector, and you can then get to 2nd and 3rd at any rpm.
2009 BMW 335i, 2003 Corvette cnv. (RIP 2001 Jaguar XK8 cnv and 1985 MB 380SE [the best of the lot])
around race tracks for most of 5 years and I've never had much of an issue with
the skip shift. It is like anything else you 'learn', I know when to stay in 1st and
that is always fun, given an after market exhaust
to 3rd shifts and almost always get just beyond 2200 rpm so that isn't an issue
either.
As for the CAGS defeat not causing long term issues, I'd have to agree as I spend
time with other Vette drivers who track their cars, many of which have had the
plug in for years and never heard of an issue.
Randy
Still getting 22+ combined around town and local hwys.
On the 2003 50th Anniversary Edition with the 4sp automatic and 2.73's in the back, how much would the rpms increase in 4th gear if I replaced with 3.15's? Will there be a noticable difference in quickness? Also, will fuel economy suffer greatly?
Thanks in advance for your comments.
On the 2003 50th Anniversary Edition with the 4sp automatic and 2.73's in the back, how much would the rpms increase in 4th gear if I replaced with 3.15's? Will there be a noticable difference in quickness? Also, will fuel economy suffer greatly?
Thanks in advance for your comments.
the extra grunt off the line. I does take a toll on mpg however, can't say how
much but I'd say on a street car that isn't set up for drags you would probably
not like it after a while of driving. imho
Randy
2008/C6, 20k, 6-speed manual
and highway fuel economy will likely drop by approximately the ratio 2.73/3.15 .