Today we got the official fuel economy numbers for the 6.7-liter LS6 engine in the 2027 Corvette Stingray. As expected after Canada’s findings last month, the new LS6 does a little worse primarily in city driving while its highway rating is the same as the 495-hp LT2 Corvette Stingray Z51.
The official rating for the LS6 from the EPA’s FuelEconomy.gov website lists the 6.7-liter LS6 as 15 MPG City, 25 MPG Highway for 18 MPG combined. The previous model year Stingray with the 6.2-liter LT2 V8 was listed as 16 MPG City, 25 MPG Highway, and 19 MPG Combined.
Not bad at all considering the LS6 produces significantly more horsepower and torque (around 535 hp vs 495 hp with Z51).
Here’s the side-by-side comparison from FuelEconomy.gov:
There wasn’t a separate listing for the 2027 Grand Sport which uses the same LS6 engine. The 2027 Stingray is exempt from gas-guzzler taxes as well.
The new sixth-generation small block uses cylinder deactivation and has other efficiency features such as dual port/direct injection. And yet by increasing the displacement to 409ci, adding the larger 95 mm throttle body, and raising compression to 13.0:1, we can see where that extra power is being made.
What’s an MPG worth? The government website says the larger engine will consume about +0.3 gallons more fuel over 100 miles versus the LT2-powered 2026 Corvette Stingray.
So, the trade off for significantly more power is a slight decrease in city driving mileage. We’ll take this as a win!
Source:
FuelEconomy.gov
Related:
First Fuel Economy Ratings for the 2027 Corvette’s LS6 V8 Are Out
2026 Corvette ZR1X Fuel Economy Ratings Now Available from Canada
EPA Officially Rates the Fuel Economy of the 1,064-hp Corvette ZR1
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Good to know. Thanks for all you do for the community Keith!
On a relatively flat freeway at 85 mph, I normally get 30+ MPG. That’s what shutting down 4 cylinders gets you. Normal driving around town is 20-25 MPG.
Not bad…. for a permanent smile….
Grand Sport window stickers are out. Fuel economy for the Grand Sport is 15 city, 23 Highway, 17 combined city/hwy. The GSX should be close to this as well.
no offence intended …. but , who cares , if you want a ‘vette , the milage is the last thing that matters… lol
I don’t know why anyone would buy a sports car with the extra complexity of cylinder deactivation. You don’t buy a Vette for gas mileage. Better off with the Z06 that does not have that crap.
I actually love cylinder deactivation. I don’t see the point of using more fuel than needed for the job at hand as long as I have the power when I want it. That’s what the corvette does and I love it. Frankly I wish it offered a start/stop option, I would definitely check that box.
Honestly an incredible number at scale. Take an impossible scenario: 60K miles of track driving over 3 years with (for argument’s sake) twice the efficiency difference of 0.6 gal/100mi with a gas price of $10/gal. Impossible? Yes. But the total difference in ownership cost is $100/month.
Or, more realistically, about $5/month.
Neil, You don’t deserve to own or drive a Corvette of any year. Stick with your Tesla.
Larry the Fairy. Thankfully, you don’t get to decide what I own or drive. Any other stupid comments you want to post that make you look as stupid as your name?
Now now Hairy Larry. You sound upset. Does that happen when people don’t agree with you? That means you must be stressed and angry all the time. Try calmimg down and you could save a ton of money on those ED meds.
I’ll send you a picture of my Grand Sport X when I get it. Maybe by the end of this year. Fingers crossed! Nice talking to ya!
When I’m on my deathbed I’m gonna be all like goddamn wish I would have spent more time arguing with strangers on the Internet through a 2×6 inch screen.
How did you know that I have ED. Have you been talking to my ex wife or did father McGilacuty tell you? Good luck getting your vette. The Grand Sport is a beautiful car.
That 50 lbs torque bump is going to push Stringray and GS closer to Z06 0-60 time I think.
DOD/AFM is all about CAFE to GM’s benefit and not making you feel good about MPG. When it fails you will not be happy.
Did anyone who ever bought a Corvette care what the MPG was? Really,anyone?
I don’t think fuel economy is a maker break decision for most buyers but to say Corvette buyers don’t care about MPG’s is inaccurate IMO. I wouldn’t buy my car if it yielded at 8 miles per gallon for example. The point I’m making is there are technologies available that improve this car’s fuel economy. Why not offer these benefits as an option? Just like everything else consumers benefit from choices. Some people will take those options and others won’t. It’s an individual decision and shouldn’t be anyone else’s problem.
Yes Bill, there are people who don’t believe in doing dumb things for internet points.
Why would anyone want to needlessly waste gas while slogging down the highway? Because it makes you feel cool? So you can post about it on Facebook? That’s the dumbest thing I ever heard; I don’t care how much money you have (and if your “sports car” is a C8 Stingray I don’t think your financial advisor would recommend you lighting money on fire because “V8”) or how much gas costs. If you don’t want AFM – just turn it off… You know you can do that, right? You just push a button, or turn a knob? I would bet a year’s worth of gas you’re the kinda guy who drives around in touring mode, and doesn’t drive the car if it might rain.
Bill I imagine you like to keep your car in 3rd gear on the highway too … because who buys a Corvette and wants to be outside of the powerband?
On the track, I get a bit over 3 mpg, depending. On the highway I can get 29 mpg. The LT1 AFM issues have been resolved. I’ve never once found myself thinking “I really wish I didn’t have this option; I wish I got to pay a gas guzzler tax, and GM’s fleet CAFE numbers were f’d so they had to limit product or buy credits from Tesla. Yea, that’s how they did it in the 80’s — pure c3 V8 power.,”
My vette averages 11 miles per gallon. I don’t care. It’s not a daily driver and most people don’t even think about gas mileage when buying one because the car is meant for the purpose of performance not MPG. It’s to bad that the C8s don’t have a manual transmission. Even Porsche has a manual transmission and other manufacturers are going to offer it again. It’s kind of nice to actually drive the car and be at one with it where you become part of the car especially on winding canyon roads.
LOL. I’ve driven a LaCrosse Super with cylinder deactivation. There’s seriously no downside to it. I drove a car (1972 Fleetwood) that got 8 city and 12 highway. It really is a lot nicer to not dip toward the single digits. Larry and Neil, really. There’s nothing wrong with wanting a little better mileage when it’s not compromising the power; and there’s nothing wrong with deciding that’s not a priority and preferring a less complex design.
I’m a new 2026 owner. I absolutely love my car. I drive it on the weekends and I burn 100% pure fuel and im averaging about 400 miles to a full tank. Yet I’ve only put 1100 miles on it in 1 month.
Can you use your gm credit card points on a corvette?
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