Forbidden Thread: C8 Fuel Mileage

[John]

While it is “forbidden territory” (LOL) to discuss fuel mileage on a Corvette forum, let’s collectively give it a whirl.

* Have you ever, even just once, thought about what your ME’s fuel mileage would be?

* Would you buy it regardless of fuel mileage — based on your knowing that Corvettes have done well the last many generations and will continue to do well in that regard?

* Are you even the slightest bit curious, and if someone were to leak the actual city/highway mileage on a thread tomorrow, would you even open that thread?

My guess is that the answer for most of us, for some of those questions is “yes.”

Thus the asking the forbidden question of what would you estimate the 2020 ME’s mileage would be, your sharing both a city and a highway mileage.

Assumptions:
1) The motor will be a next gen, LT1, naturally aspirated, DOHV, possibly reduced to 5.5L;
2) The car will only have one transmission, e.g., a 7 speed DCT;
3) The car will weigh 3,340 pounds.

[JB]

I believe the motor will be a revised lt1 at 6.2 liters and provide similiar gas mileage to the c7.

the transmission choices will be dct and also the 10L80..lol for higher fuel efficiency and comfort..

what the cars weight will be is anybodies guess,

[Shadow]

Guessing that it will be 16 city/27 hwy, and like always exceed that in real life for many, that 30+ MPG average for long road trips will be often exceeded. Yes I would love for someone to tell us in a new thread tomorrow, its actual mileage numbers (though we know that is still a long way away.

I have never once before today even thought of its fuel economy. Whatever, whatever.

[meyerweb]

Not worried about it, and unless it only gets something like 12 mpg highway it won't affect my purchase decision. I no longer have a commute, so I don't put neatly as many miles on cars as I used to (although I've managed to put 30K miles on in 3 1/2 years). And my disposable income, while not at the level of some members here (I'm looking at you, Ferrari and Lambo owner!), is enough that I don't need to worry about gasoline.

I would expect the C8 to get similar mileage to the C7, if not better. It might incorporate GM's newer variable displacement technology, which would improve things a bit, and technology marches on.

As for the A10, as JB suggested, I doubt it. For several reasons: One, an ME car won't have a separate transmission and differential like the C7 does. It will have a true transaxle. And I doubt GM will pay the development cost to repackage the A10 into a transaxle format, in addition to the cost of the DCT. Two, the A10 is huge. Even bigger than the A8 in the C7. Making that fit in the space behind the rear axle might be tough (although that could, I suppose, explain the very large rear overhang on the C8 cars we've seen.

Here's a typical transaxle, this one out of the old Ford GT.

[Frenzy36]

16 City 24 Highway

[TOMDOM69]

the mileage will be just good enough to avoid the gas guzzler tax

[Racer X]

Think it will have start/stop technology?

[MidEngine]

I don’t think that it will.

[Ssscooter66]

Think it will have start/stop technology?

I hope not, I want to hear the car ....
Never even thought about gas mileage, its got to be better than my truck ....

[Fireeagle]

I'm sure the base will be around or a little better than the C7 Stingray base.

[AbqVic]

Unlike many, fuel mileage is very important to me. The resulting range increase allows a lot more flexibility when planning fuel stops on long trips. Plus, once I’m in “getting down the road mode,” I hate to stop for gas!

[meyerweb]

Think it will have start/stop technology?

If the current administration's relaxation of economy standards holds up in court, no. Otherwise, yes, although maybe not for the first couple of years.

[meyerweb]

Unlike many, fuel mileage is very important to me. The resulting range increase allows a lot more flexibility when planning fuel stops on long trips. Plus, once I’m in “getting down the road mode,” I hate to stop for gas!

I find my body's 'range' to be a more limiting factor than fuel range.

[whl3]

More than what decent fuel economy might save me in $$$$, I look at good fuel economy in a 6.2L V8 with 460 hp as an engineering triumph! No matter what the EPA listed as mileage for my C7, I am constantly amazed at what mpg it returns, as is everyone else that asks! We cannot forget that GM has the CAFE requirements. They can't make it all up on the Volt, the Bolt, and the Spark! Corvettes, in their production numbers, have to pull their own weight as a part of that average. I'm sure that they will try and keep the weight of the C8 as light as economically feasible. I would think that they would incorporate their newest "Dynamic Fuel Management" technology (over the current cylinder deactivation technology) into the 2020 engine (whatever it might be) in Economy Mode (hopefully this will not include start/stop technology). I'm hopeful that they will also incorporate both direct injection, as well as, port injection into this engine as well. This newer technology, plus any other that they may pull from their hat, should result in equal to or even better C8 EPA fuel economy than that of the C7 LT1!

Bill

[khanmark]

While it is “forbidden territory” (LOL) to discuss fuel mileage on a Corvette forum, let’s collectively give it a whirl.

* Have you ever, even just once, thought about what your ME’s fuel mileage would be?

* Would you buy it regardless of fuel mileage — based on your knowing that Corvettes have done well the last many generations and will continue to do well in that regard?

* Are you even the slightest bit curious, and if someone were to leak the actual city/highway mileage on a thread tomorrow, would you even open that thread?

My guess is that the answer for most of us, for some of those questions is “yes.”

Thus the asking the forbidden question of what would you estimate the 2020 ME’s mileage would be, your sharing both a city and a highway mileage.

Assumptions:
1) The motor will be a next gen, LT1, naturally aspirated, DOHV, possibly reduced to 5.5L;
2) The car will only have one transmission, e.g., a 7 speed DCT;
3) The car will weigh 3,340 pounds.

I don't really see this as forbidden territory. I mean the longer you can enjoy your corvette drive with the limited fuel tank capacity the better right? Why waste time fueling up (stopped), when you can be cruising?

John, do you think we'll be able get 300 or 400 miles out of a tank of gas? I'm personally guessing somewhere in around 350 miles on a tank.