Real world Gas Mileage

zznalg · 03-08-2008, 08:13 AM

Hi All, I'm new to the board and am considering an '08 STI. I'm wondering how an unmodded new STI does in real world fuel consumption?

What are averages of highway, city or mixed driving?

What are best highway mileage results (at what speeds)?

(Sorry if this subject has already been beat to death..)
Thanks.

polyol · 03-08-2008, 08:23 AM

25 highway

18 city

Average 20-21mpg

NaoNao · 03-08-2008, 09:03 AM

Highest MPG I've reached was 24 during break in when I was babying the car. Now I average about 21 with mixed driving.

Rootus · 03-08-2008, 09:07 AM

Quote:

Originally Posted by polyol

25 highway

18 city

Average 20-21mpg

That's about what I've experienced. Once I went stage 2 the averages went up a little, I get 23-25 in mixed city/highway driving, and 27-28 on a long highway cruise. I get a lot of variation, however, between summer and winter driving. Typically ~5 mpg less during the winter months. It's not the gas, because where I live we run "winter gas" year round. AFAIK it's just the denser, colder air and my desire to use it for going faster....

mofoSTI · 03-08-2008, 11:53 AM

I have averaged 17.8 in almost 3,000 miles.

TampaSTI · 03-08-2008, 03:21 PM

With oil prices going crazy on world markets, you might wonder what Europeans are driving where gasoline prices might hit $6, $7, or even $8 a gallon. How many gallons is the tank on '08 STI 13,14 ???

GeorgeWrx · 03-08-2008, 03:45 PM

Finally got my 08 silver w/BBS yesterday morning

After letting it warm up, I hit reset on the mpg calculator and actually got 25.5 mpg driving home from work! This is 16 miles mostly back roads with only a little highway and driving like a granny in intelligent mode.

JWA · 03-08-2008, 05:09 PM

My '08 is breaking in nicely and getting noticeably stronger while returning better MPG numbers. The gauge on the dash is surprisingly close, being a couple tenths lower than actual most times. The best I've seen so far was 22.5 last night on the highway. On my '07 I averaged 22 or so on the highway, so they're about the same.

ShinobiDGM · 03-08-2008, 10:55 PM

Averaging about 18.3 mpg with mixed city/hwy driving.... Currently at 740 odo ^.^

Hopefully it will improve as my miles pile up!

skeeler · 03-09-2008, 12:50 AM

The most I ever got was 31 mpg in I-5 rush-hour traffic from Bellingham to Tacoma (avg 60 mph). That was immediately after a reflash. When I was driving entirely on the highway, it was usually above 26 mpg, but now that I'm driving out in the county with a lot of turns and such, it's probably around 22-23 on the winter tires and around 18-19 with the summer tires. Just how much of that is burned for rev matching, I don't know, but I am still on the original rotors at 138,000.

HASTIhatch · 03-09-2008, 01:50 PM

So far I'm getting like 15-16mpg for the first few fill ups with mainly city and some highway. Guess I am enjoying it too much, but honestly, I don't know how some of you guys get the numbers you get. I realize you're grannying it but goodness. Any tips (other than lay off the gas)?

Dj Hurricane · 03-09-2008, 01:56 PM

Quote:

Originally Posted by HASTIhatch

So far I'm getting like 15-16mpg for the first few fill ups with mainly city and some highway. Guess I am enjoying it too much, but honestly, I don't know how some of you guys get the numbers you get. I realize you're grannying it but goodness. Any tips (other than lay off the gas)?

+1^

15-17 mostly city... mostly S mode :/ some hywy (same as my 2.5 LGT)

900 miles and counting.

Royal Purple this week!

Bishop · 03-09-2008, 02:08 PM

the gas mileage, im pretty sure, will be terrible when you first buy the car, and for the first 1k miles or so.... that was the case w/ my 07.... as soon as the motor is "broken in" after the recommend mileage in the manual, and you can start revving the engine higher and driving a little more spirited, the mileage should improve.... i had about 18mpg when i got the car, and it scared me cause my WRX was averaging 28mpg lol.... after driving the recommended break in miles, and then driving the car with a little more oomph. my mileage sits at about 21-22mpg now.... hope that helps.... it was on an 07 STi, but i cant imagine the 08 being terribly differnt

BlueF · 03-09-2008, 02:14 PM

Quote:

Originally Posted by mofoSTI

I have averaged 17.8 in almost 3,000 miles.

Same here (18.1 in 3250 miles).

Suprisingly, the dash mpg gauge is with-in 1-2 tenths of my calculations (miles traveled divided by gallons each fill-up).

03-08-2008, 08:13 AM	#1
zznalg Lurker Fav Mod: Coming Soon Posts: 1 Join Date: Mar 2008 Trader Rating: (0)	Real world Gas Mileage Hi All, I'm new to the board and am considering an '08 STI. I'm wondering how an unmodded new STI does in real world fuel consumption? What are averages of highway, city or mixed driving? What are best highway mileage results (at what speeds)? (Sorry if this subject has already been beat to death..) Thanks. This ad is not endorsed by this member. Please register or login to hide this ad.

03-08-2008, 08:23 AM	#2
polyol Spec C Club Car: 04 STi Fav Mod: Motor Mounts Location: Eugene Posts: 2,266 Join Date: Oct 2004 Trader Rating: (0)	Re: Real world Gas Mileage 25 highway 18 city Average 20-21mpg

03-08-2008, 09:03 AM	#3
NaoNao Silver Member Car: 08 OBP STI Location: San Antonio, TX Posts: 48 Join Date: Jan 2008 Trader Rating: (0)	Re: Real world Gas Mileage Highest MPG I've reached was 24 during break in when I was babying the car. Now I average about 21 with mixed driving. Last edited by NaoNao : 03-08-2008 at 09:06 AM.

03-08-2008, 11:53 AM	#5
mofoSTI Spec C Club Car: 08 STI,sr20det 510 Fav Mod: boob job for wife Location: springtuckey, OR Posts: 2,441 Join Date: Sep 2004 Trader Rating: (0)	Re: Real world Gas Mileage I have averaged 17.8 in almost 3,000 miles.

03-08-2008, 03:21 PM	#6
TampaSTI Professional STI Racer Car: 05 Subaru WRX STi Location: Tampa Posts: 630 Join Date: Jun 2005 Trader Rating: (0)	Re: Real world Gas Mileage With oil prices going crazy on world markets, you might wonder what Europeans are driving where gasoline prices might hit $6, $7, or even $8 a gallon. How many gallons is the tank on '08 STI 13,14 ???

03-08-2008, 03:45 PM	#7
GeorgeWrx Amateur STI Driver Posts: 48 Join Date: Jan 2008 Trader Rating: (0)	Re: Real world Gas Mileage Finally got my 08 silver w/BBS yesterday morning After letting it warm up, I hit reset on the mpg calculator and actually got 25.5 mpg driving home from work! This is 16 miles mostly back roads with only a little highway and driving like a granny in intelligent mode.

03-08-2008, 05:09 PM	#8
JWA Senior STI Driver Posts: 301 Join Date: Mar 2007 Trader Rating: (3)	Re: Real world Gas Mileage My '08 is breaking in nicely and getting noticeably stronger while returning better MPG numbers. The gauge on the dash is surprisingly close, being a couple tenths lower than actual most times. The best I've seen so far was 22.5 last night on the highway. On my '07 I averaged 22 or so on the highway, so they're about the same.

03-08-2008, 10:55 PM	#9
ShinobiDGM Junior STI Driver Car: DGM GRB STi Fav Mod: My broadway mirror Location: CA Posts: 176 Join Date: Feb 2008 Trader Rating: (0)	Re: Real world Gas Mileage Averaging about 18.3 mpg with mixed city/hwy driving.... Currently at 740 odo ^.^ Hopefully it will improve as my miles pile up!

03-09-2008, 12:50 AM	#10
skeeler Professional STI Driver Car: '04 WRC Blue Pearl S Fav Mod: Nokian WR's, then RSi's, Bridgestone Potenza RE-01R's Location: Sumas, WA Posts: 419 Join Date: Feb 2004 Trader Rating: (0)	Re: Real world Gas Mileage The most I ever got was 31 mpg in I-5 rush-hour traffic from Bellingham to Tacoma (avg 60 mph). That was immediately after a reflash. When I was driving entirely on the highway, it was usually above 26 mpg, but now that I'm driving out in the county with a lot of turns and such, it's probably around 22-23 on the winter tires and around 18-19 with the summer tires. Just how much of that is burned for rev matching, I don't know, but I am still on the original rotors at 138,000.

03-09-2008, 01:50 PM	#11
HASTIhatch Junior STI Driver Car: 08 Aspen STi Hatch Fav Mod: Stage 2 AP Location: Silver Spring, MD Posts: 166 Join Date: Feb 2008 Trader Rating: (0)	Re: Real world Gas Mileage So far I'm getting like 15-16mpg for the first few fill ups with mainly city and some highway. Guess I am enjoying it too much, but honestly, I don't know how some of you guys get the numbers you get. I realize you're grannying it but goodness. Any tips (other than lay off the gas)?

03-09-2008, 02:08 PM	#13
Bishop HowTo Contributor Car: 07 OBP STi Fav Mod: Stg 2 - STRI gauges Location: Niwot, CO Posts: 2,326 Join Date: Oct 2007 Trader Rating: (0)	Re: Real world Gas Mileage the gas mileage, im pretty sure, will be terrible when you first buy the car, and for the first 1k miles or so.... that was the case w/ my 07.... as soon as the motor is "broken in" after the recommend mileage in the manual, and you can start revving the engine higher and driving a little more spirited, the mileage should improve.... i had about 18mpg when i got the car, and it scared me cause my WRX was averaging 28mpg lol.... after driving the recommended break in miles, and then driving the car with a little more oomph. my mileage sits at about 21-22mpg now.... hope that helps.... it was on an 07 STi, but i cant imagine the 08 being terribly differnt