What mpg are you getting?

[EdP]

Has anyone noticed an improvement in gas mileage over time? I ask because I had a loaner which got considerably better mileage than my car...

Yes, after a good 1000 miles or so. Even wheel bearing and differential gears loosen up a bit. Not dramatic but noticeable.

 

[LandOfConfusion]

Can these threads be merged?

2.0T - Actual Tracked Mileage With Real Driving Numbers vs In-Vehicle Estimation (G70 2.0T)

 

[CVODON]

Live in a moderate size town with alot of tourist traffic, in 4400 miles if we stay intown it stays around 21.5 on comfort. Did fill it once in Tampa and drove straight up I-75 to Tennessee got 32.1 actual (pen & paper, mileage/gallons) @ 72 on cruise in Eco. Lowest interstate mileage has been around 29-30. Actual mileage has been a very nice perk of the car so far. Use 93 octane exclusively and try to only buy Top Tier brands. Direct injection motors have enough intake valve problems without adding poor quality fuel to the mix.

 

[steelers84]

So I've been seriously questioning how you guys have been getting such amazing MPG. After 1,500 miles with the car, the best MPG I was able to muster on the highway was ~23-24 MPG in ECO mode (real calculation, car read ~25 MPG).

I tried everything (or so I thought), and finally tried to slow my ass down yesterday and kept the cruise set to 62 MPH. Well, 28 miles later and the car was reading almost 30 MPG. My daily commute hovers in the 70-80 MPH range and I noticed that the car almost always has boost in that range. In the ~60-65 MPH range it almost never has boost. Is anyone else noticing that their MPG falls off a cliff after a certain speed?

It's not a huge deal (now that I know), but I found it very interesting that the difference was so large.

 

[joschneider]

So I've been seriously questioning how you guys have been getting such amazing MPG. After 1,500 miles with the car, the best MPG I was able to muster on the highway was ~23-24 MPG in ECO mode (real calculation, car read ~25 MPG).

I tried everything (or so I thought), and finally tried to slow my ass down yesterday and kept the cruise set to 62 MPH. Well, 28 miles later and the car was reading almost 30 MPG. My daily commute hovers in the 70-80 MPH range and I noticed that the car almost always has boost in that range. In the ~60-65 MPH range it almost never has boost. Is anyone else noticing that their MPG falls off a cliff after a certain speed?

It's not a huge deal (now that I know), but I found it very interesting that the difference was so large.

what gas do you buy? i hit 75 as my freeway average using top tier 91, and can easily hit an indicated 28 mpg (in the summer, still need to test how far down the winter blend gas knocks it down)

edited to add: check your tire pressures too, could be that youre running a lower pressure than recommend which would cause you to have worse mileage

 

[Toddasaurus]

So I've been seriously questioning how you guys have been getting such amazing MPG. After 1,500 miles with the car, the best MPG I was able to muster on the highway was ~23-24 MPG in ECO mode (real calculation, car read ~25 MPG).

I tried everything (or so I thought), and finally tried to slow my ass down yesterday and kept the cruise set to 62 MPH. Well, 28 miles later and the car was reading almost 30 MPG. My daily commute hovers in the 70-80 MPH range and I noticed that the car almost always has boost in that range. In the ~60-65 MPH range it almost never has boost. Is anyone else noticing that their MPG falls off a cliff after a certain speed?

It's not a huge deal (now that I know), but I found it very interesting that the difference was so large.

Some people just have flatter roads and less traffic than others. I rarely get to drive on the freeway, and I'm averaging about 18 mpg on my current tank with city only driving in ECO mode, trying my best to drive extremely easy. In Sport or Custom mode, I get around 16mpg. Thing is I have a ton of stop lights and a ton of traffic in my daily commute. But, like you mentioned, speed is a big factor. One time I got over 30mpg on the freeway by not going over 50mph. Lol.

The other day I finally drove on the freeway, I haven't in quite some time, and I got about 23mpg in ECO mode - again, had some fair traffic, but not too bad. I think the cold weather results in worse mpg in general. Though now that I think about it, I didn't reset my meter when I started out. Oh well. So maybe it was higher. *shrug*

My point is, don't stress too badly about it. Everyone's driving conditions are different, and such differences make an impact on mileage. Also, RWD vs AWD makes a significant difference. (I'm AWD). Still, my numbers suck really bad lately. Lol.

 

[KusaKusa]

I've started using 87 octane on my 2.0T. I haven't seen any mpg differences compared to 91 octane. It's still about 25-28 mpg during my commute.

 

[squijello]

Is eco mode really that much better than comfort mode assuming you're not driving like a maniac?

 

[RoyG70]

Mine has sucked - about 16 MPG. Mostly congested city, commutes, though, and I have only used regular 87 octane. 3.3t in comfort mode.

 

[steelers84]

what gas do you buy? i hit 75 as my freeway average using top tier 91, and can easily hit an indicated 28 mpg (in the summer, still need to test how far down the winter blend gas knocks it down)

edited to add: check your tire pressures too, could be that youre running a lower pressure than recommend which would cause you to have worse mileage

Funny you say that, because my initial thought was that it was just bad gas (even though I was putting in top tier 93). Put Sunoco 93 in hoping it would get better and it never did. It's most likely my driving habits and the road I am traveling, but I thought it was a little strange that the difference between ~62 and ~75 MPH was 3-5 MPG.

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[tarhoosier]

Air resistance increases at the square of velocity. Riding my bike in calm conditions, flat ground, uses energy and as I increase my speed the effort to maintain the higher speed requires a significant increase in energy (pumping legs, lung air exchange). To the air I look like a brick when on my bike. Cars are similar. Physics.
Engine efficiency, tire rolling resistance, coefficient of drag, and other issues are involved.

 

[joschneider]

Whelp, I hit 23 indicated on my freeway drive home. I’m 2 psi low on all my tires, so that and shitty winter gas are having their effect for sure

 

[CVODON]

Whelp, I hit 23 indicated on my freeway drive home. I’m 2 psi low on all my tires, so that and shitty winter gas are having their effect for sure

Worked for 12 years and made fuel. In winter is was a higher refining process to remove moisture and increase the oxygen content along with some more costly additives in an attempt to keep it dry during transport and in storage. Your the first person I ever heard that felt better procedures & products made it "shitty". Tend to think it is more the right foot than the fuel or air, but then maybe not. Also the LV ratio for winter blend is pretty low compared to the northeast, yours is similar to my Florida blends which are almost non-existent.

 

[joschneider]

Worked for 12 years and made fuel. In winter is was a higher refining process to remove moisture and increase the oxygen content along with some more costly additives in an attempt to keep it dry during transport and in storage. Your the first person I ever heard that felt better procedures & products made it "shitty". Tend to think it is more the right foot than the fuel or air, but then maybe not. Also the LV ratio for winter blend is pretty low compared to the northeast, yours is similar to my Florida blends which are almost non-existent.

Sorry but I thought it was common knowledge that winter gas provides worse mpg, thus ‘shitty’. I have no doubt it provides value and takes more processing but you do get worse mileage with it

 

[pulsar]

Worked for 12 years and made fuel. In winter is was a higher refining process to remove moisture and increase the oxygen content along with some more costly additives in an attempt to keep it dry during transport and in storage. Your the first person I ever heard that felt better procedures & products made it "shitty". Tend to think it is more the right foot than the fuel or air, but then maybe not. Also the LV ratio for winter blend is pretty low compared to the northeast, yours is similar to my Florida blends which are almost non-existent.

Like made fuel at the refinery level? Cool. So educate me and maybe some others here. Do refinery’s just make generic premium and generic unleaded and the fuel depo distribution place does all the additive packages that separates brand to brand and top tier gas from plain Jane gas? Inquiring minds want to know. Thanks

 

[KusaKusa]

Is eco mode really that much better than comfort mode assuming you're not driving like a maniac?

For cruising on the highway, probably not. From what I understand, Eco's main advantages over Comfort are stronger focus on maintaining higher gears and disconnecting the transmission during coasting. If you're just staying at a constant speed at 8th gear, the mpg should be the same. But if you're in traffic with variable speed, you could save a bit of gas probably.

For driving in general... I'm not sure. I think you'll save more with the 3.3TT in Eco vs the 2.0T. The 3.3TT seems to chug gas to get going from low speeds, even in normal situations.

 

[squijello]

For cruising on the highway, probably not. From what I understand, Eco's main advantages over Comfort are stronger focus on maintaining higher gears and disconnecting the transmission during coasting. If you're just staying at a constant speed at 8th gear, the mpg should be the same. But if you're in traffic with variable speed, you could save a bit of gas probably.

For driving in general... I'm not sure. I think you'll save more with the 3.3TT in Eco vs the 2.0T. The 3.3TT seems to chug gas to get going from low speeds, even in normal situations.

I'll try using eco during my commute and see how it goes... I just don't want to put the 365 horses to waste lol

 

[danygenesis]

You can use Smart mode. It will behave according to your driving habits, Smart will move from Eco when you are driving calm to Sport when you need those 365 horses.

 

[Carguy55]

I use Fuelly to track my MPG and so far the best I've seen with mixed driving (probably about 60% surface streets) is 19.8 with straight city driving at 16.5. My tires are within 1 psi of the recommended pressures when cold (adjusted a couple of weeks ago when Winter hit early!) and I use "Top Tier" 93 octane fuel (mostly from COSTCO). My 2008 Corvette (w/436 HP) actually did better in mixed driving (22 - 23 MPG) with the same city mileage, so I'm not saving any $$ with the G70 3.3T but I really appreciate the comfort, AWD and added tech vs. the Vette!
Enjoy,
Carguy55

 

[Alfer]

Thankfully our gas prices are getting close to $2 a gallon so I don't really sweat MPG these days.