Gas Mileage

[CKeeler]

I average 31 mpg on my 42 mile trip to work running 70mph 85% highway. I do 75 on the way home and happily pass people and get 28mpg average. My gas tank usually hovers around 26 avg

 

[Dr_jitsu]

Gas mileage is down the list when it comes to car costs. We see it and the money spent on the daily, so it gets more attention. Depreciation on these cars is way more than gas costs.

The tires on this car are amazing....and expensive. You will spend nearly as much money on tires as you will on gas. Enjoy it.

 

[Lawrence Williams]

My typical drive to work. GT2 AWD

View attachment 29442

How slooooooooooow are you going? Left lane with markers on 20 below posted? Yikes , that's awesome

My typical drive to work. GT2 AWD

View attachment 29442

 

[Aarvix]

Gasoline's thermal expansion coefficient is 9.6x10^-4 per degree C

Quick on-the-toilet-at-work math says that a 20F degree swing (11.11C) is only about 1.06% volumetric change.

Significant in large volumes, but would not really explain much difference between computed vs calculated MPG.

 

[Gargamel]

Gasoline's thermal expansion coefficient is 9.6x10^-4 per degree C

Quick on-the-toilet-at-work math says that a 20F degree swing (11.11C) is only about 1.06% volumetric change.

Significant in large volumes, but would not really explain much difference between computed vs calculated MPG.

My experience with the cars i had. It the computer says 0.6L/10km (Real world meassurment units) you always have to add ATLEAST 0.1L/10km to the number comparing it to the pump. Sometimes even more. (Im looking at you volkswagen!)

 

[BlaydeX15]

Lol, you're not being shorted.

As the temperature rises, gas expands and vis versa. The hotter it is, the less liquid your tank holds comparatively.

Not to the extent of the discrepancy between computed mileage and measured mileage though. Some reading material: Buying cold gasoline

TL: DR - Gasoline expands or contracts by 1% for every 29°F the temperature of the gasoline changes. This is measured against a baseline of 59°F. 0°F gasoline is only 4% more dense than 120°F Gasoline, and both are only 2% away from what the pump measures, in their respective direction. Additionally, since the Gasoline is stored underground, the dispensed temperature is less affected by ambient temps (if you've ever noticed that pumped gas is cold in the summer, this is why). And if you're in Canada or Europe, the pump does the math for you and adjusts the dispensed amount to adjust for expansion!

So yeah, real numbers:
19,750 Miles in my car
As measured at the pump: 26.8 MPG
As measured by the trip odometer (Which I haven't reset since buying the car): 28.7 MPG

In order for that 6% difference to be explained by thermal expansion and contraction, I would have to be filling my tank with gasoline that was sitting at about 233°F when I pump it.

Additionally, it is well documented that the car computer averages high in quite a few car models. See Your Fuel Economy Gauge Is Fibbing | Edmunds Explanations given are usually attributed to mechanical differences in between what the sensors are giving, and what the engine is getting. Stuff like less energy dense fuel (like ethanol blend), or even tiny tiny injector blockages cause discrepancies between the calculated and the real world mileage, and that the 5.5% average over-reporting as Edmunds tested it is within the manufacturer's tolerances.

Yay, numbers!

 

[GenesisG70]

Daily drive mostly highway 70mph get 28 mpg without even trying, put on eco and if need to pass I pass if I speed for few secs so be it. getting good mpg for what the car is.

 

[MisterMac]

How slooooooooooow are you going? Left lane with markers on 20 below posted? Yikes , that's awesome

40-50 mph on surface streets 70-80 on the interstate.

 

[RUFFSTUFF]

FTR, I tend to get better mileage in COMFORT than ECO. In SMART, it's usually in COMFORT anyway... At the end of the day, it's a Stinger not an Optima... Let it rip!

 

[Mike_TX]

Eat your heart out. That's what the little 2.0T will do for you. lol.

 

[RUFFSTUFF]

View attachment 29524

Eat your heart out. That's what the little 2.0T will do for you. lol.

Yeah, but you're easy to pass...

 

[Gargamel]

I guess my night drive just now wont help my milage today..
I had to drive atleast 50 KM, and did it in around 50 minutes in sports mode and breaking the speed limit by atleast 50%.
(My "excuse": I had to dump off papers at my accountant for my company)

 

[SFM]

I get 18 mpg on city streets with the 2.0T

 

[Rob M]

I get 18 mpg on city streets with the 2.0T

That's probably normal for REALISTIC city driving. The US EPA cty estimate for 2.0T is 22 mpg, but does this sound like your typical city drive in rush hour traffic?:

- speeds of up to 56.7 mph
- average 21.2 mph
- never stop at a light for more than 45s with most stops much shorter
- average just one complete stop every half mile of driving

If you are like most people who live in/near large cities and actually struggle with real rush hour traffic, you likely aren't reaching speeds of up to 56.7 mph on surface streets. You may also spend some time creeping along in traffic at 0 - 20 mph which isn't simulated at all by the EPA. You probably stop at a few traffic lights that have cycles of anywhere from 45 to 120s, and may be stopped even longer waiting for traffic to get moving - or even get stuck at the light through a second cycle. If your AC is running, your engine will be running for some of that idle time as well. That's why very few people (except maybe electric or hybrid vehicle drivers) brag about good cty fuel economy - you're not likley to beat the estimates in a real city rush hour environment. Instead, most ICE drivers are content to use hwy figures in efficiency discussions.

 

[Mike_TX]

That's probably normal for REALISTIC city driving. The US EPA cty estimate for 2.0T is 22 mpg, but does this sound like your typical city drive in rush hour traffic?:

- speeds of up to 56.7 mph
- average 21.2 mph
- never stop at a light for more than 45s with most stops much shorter
- average just one complete stop every half mile of driving

If you are like most people who live in/near large cities and actually struggle with real rush hour traffic, you likely aren't reaching speeds of up to 56.7 mph on surface streets. You may also spend some time creeping along in traffic at 0 - 20 mph which isn't simulated at all by the EPA. You probably stop at a few traffic lights that have cycles of anywhere from 45 to 120s, and may be stopped even longer waiting for traffic to get moving - or even get stuck at the light through a second cycle. If your AC is running, your engine will be running for some of that idle time as well. That's why very few people (except maybe electric or hybrid vehicle drivers) brag about good cty fuel economy - you're not likley to beat the estimates in a real city rush hour environment. Instead, most ICE drivers are content to use hwy figures in efficiency discussions.

Yeah, this. Even though congestion in our area has increased exponentially in the last couple of years, I still get a solid 22 in town with my 2.0.

 

[BertBert2019GT]

i’m getting 100 miles to the gas tank today...

 

[TwiceStung]

Just drove 1044 miles over the holiday weekend......99.8% freeway......and the calculated MPG was 33.7. Just me and I-81. I have a 2018 2.0 Premium running on Premium with 6000+ miles on it now.

 

[Jimmer]

Between 29 and 31 MPG driving in Smart Mode to Denver, in Denver, and back from Denver.

 

[TwiceStung]

Between 29 and 31 MPG driving in Smart Mode to Denver, in Denver, and back from Denver.

Forgot to mention.....I was in Eco mode but I had a very heavy foot.

 

[MerlintheMad]

Between 29 and 31 MPG driving in Smart Mode to Denver, in Denver, and back from Denver.

Obviously, no drifting in the new GTS.