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Old 03-04-2013, 05:06 PM   #26
the suicidal eggroll
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Originally Posted by MWRX13 View Post
in my experience i have had the following....(i live in fairfield county ct...rural enough but not in farmland)

completely stock 13wrx sedn. - 19-22mpg driving easy on it and about 17-19 driving like a madman 24mpg on a 5th gear cruise control set at 70 / rolling in 5th between 40 and 65mph i have gotten 26-30.

Cobb AP stage 1 stock parts - 16-19mpg any way you slice it...pay to play.

what i do now is flashed my ECU to economy mode which turns down your boost to about 8PSI and rev limiter to 5K (please note: this is a lean map - you punish your car with this map and you WILL mess something up....dont bother flashing back to stock after because subaru can tell if you have messed with the edu.) this allows me about 22-25mpg when i want to turn it up i do a real time flash (takes about 3 seconds) and voila boost for all.

as far as 91vs93....the cobb AP lets you do it efficiently...no matter how you slice it 91 burns lower temp then 93....this is for people that love their engines more then vagina...which i sometimes do. but people in CA will run 91 forever.

if you want really good gas mileage - go buy a honda.
What on earth are you talking about?

1) A stage 1 tune does not lower gas mileage unless you are always going WOT. Neither does stage 2. If you don't use the additional power, you don't use the additional gas.

2) The economy tune is a complete waste of time and a marketing gimmick. Use your right foot to control fuel consumption, you'll do a much better job than that POS ticking time bomb of a tune.

3) A real time flash does not set all of the tables properly, only those that are explicitly specified. Be very careful going WOT with just a real time tune running on top of an economy base map, because there could still be a few "economy map" tables that are in effect.

4) 93 does not burn hotter than 91, and 91 is not for protecting the engine. The octane rating essentially tells you how controllable the burn is. 87 is like the fire swamps in the princess bride, it's going to ignite somewhere, but you don't know when or where. 93 still sucks, but is better. Race gas is like a bunsen burner, you know exactly how it's burning, where it's burning, how hot it's burning, and where the flame front is moving. It's controllable, slower, and can you can get much more aggressive with the tune without the risk of the air/fuel mixture exploding for no damn reason during the compression stroke and blowing a hole through your piston.
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Old 03-05-2013, 08:04 AM   #27
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I would say most of the drives have been around ~30F or so, yes, from a "cold start", I let it warm up about 5mins before driving.
Lets see: 10 mile drive, stop and go traffic, with a 5 minute warmup from cold start in ambient temps around 30 deg F.
I'd say you're getting pretty good MPG for those condtions.
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Old 03-05-2013, 08:27 AM   #28
nightdown fox
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^ yep, this. Although the "stay outta boost" portion if this thread has some legitimacy too. Eeked a few more mpg out when I bought a boost gauge.
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Old 03-05-2013, 08:35 AM   #29
Wrexflex
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I tested this yesterday on my 15-mile, city drive home from work and when I pulled in the driveway I was sitting at 27.5 MPG, keep in mind I was very light on the throttle. I hit a good amount of stop lights too. Stage 2
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Old 03-05-2013, 08:56 AM   #30
leach0789
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Drive it for a full tank, not 10 miles, then report back.
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Old 03-05-2013, 03:13 PM   #31
Trustkevin13
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yup, i usually get 21-22 average with both the city (lots of it), and highway (lots of this as well). but on the very flat roads, i get about 29-31 mpg at stage 2 going 65-68. its pretty nice. I'm currently at a "stage 2" set-up. hopefully it wont change to much after i swap in a vf52 and ebcs+tune. i dont think it will though.
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Old 07-03-2013, 08:16 PM   #32
busygettingthere
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I don't care a out gas milage. I consider it an interesting fact and an entertainment expense. I have a full average of 16.2 over 6k. I can get about 22 driving nice on the freeway. I run stage 1 accessport 91 +sf on 92 gas
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Old 07-03-2013, 08:52 PM   #33
Blktrax
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Skip shift: you don't have to use every gear every time.

I generally spin up to 3500

1st then 3rd, then either 4th or 5th. depending on traffic.


Staying in gear longer slowing down also keeps the motor in fuel cut, momentum keeps the motor spinning, no fuel is being applied.

As soon as you push the clutch in, then the motor has to run on fuel again.

I beat my stage 2 wrx pretty regularly and average 21.5MPG
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Old 07-04-2013, 11:17 AM   #34
dingobite
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I tested abit when i first got the Sti the ecu never remembers with me behind the wheel as easily if i dont drive about 90 miles usually i do highway miles after that it remembers 17-19mpg or above. I dont have to constantly reset the odometer every time i start the car.

For me just doing 20 mile round trips every night gets me 10-15mpg my last trip i got 19mpgs grinding second gear for over a hour in the mountains.
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Old 07-06-2013, 07:30 PM   #35
a3ng25
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Stock to stage 1 to stage 2 Ive gotten seemingly the same mileage. The car trip meter always reads between .5-1mpg higher than if I divide the trip mileage/gas per pump. I trust trip/pump more than the dash calculation. Trip/pump puts me consistently around 20mpg city, 24mpg highway, 28 mpg highway w/a ***** foot and 100% cruising.

I've got a 2013 WRX sedan.
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Old 07-06-2013, 08:23 PM   #36
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The best mpg improvement I saw was when I installed a boost gauge. It's better to shift at 3500-4200 rpms with 10psi vacuum then 2500 and get into boost
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Old 07-07-2013, 08:47 AM   #37
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Quote:
Originally Posted by Trustkevin13 View Post
yup, i usually get 21-22 average with both the city (lots of it), and highway (lots of this as well). but on the very flat roads, i get about 29-31 mpg at stage 2 going 65-68. its pretty nice. I'm currently at a "stage 2" set-up. hopefully it wont change to much after i swap in a vf52 and ebcs+tune. i dont think it will though.
it wont change much. when i was stock i got around 24 mpg. 3 years now ive been on a vf52 and stage 3 mods and tune and still around 24 mpg.
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Old 07-07-2013, 11:27 AM   #38
BlueSubie541
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When I first got my 13 wrx and was around 1.2k miles I was getting like 16 to 17 Mpg...but now that the car is fully broken in...I get like 20Mpg on the back roads and like 28 to 30 mpg highways...atleast that's what my trip meter says!! Im sure once your car hits 2k miles.. your mpg will slowly start to go up!!
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Old 03-08-2014, 01:01 PM   #39
busygettingthere
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I get 13's around town and mid 20's on a freeway trip. With mixed driving and not much freeway I avg around 14. Stage 2 protune all supporting mods.
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Old 03-08-2014, 08:05 PM   #40
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For long trips I like to unhook my turbo and totally bypass its, tape the whole front end of my car up, like nascar, and run four donut spare tires for decreased rolling resistance. If I'm feeling motivated I'll take out an injector and grease my car for decreased drag on a real not I have a 2013 wrx and abs 25-26 in the summer. Winter time I have to much fun sliding around.
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Old 03-08-2014, 08:26 PM   #41
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Who cares about mpg's when you got that turbo!!! I hand calculated my mpgs a few times for shiz and I get 14.3 lol. I'm foot to the floor basically everywhere once oil is up to temp.

I don't get the point of owning a performance car just to drive like a 80 year old to save a few bucks on gas but then turn around and toss $200 on an intake or 1k on mad tight wheels.
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Old 03-08-2014, 08:26 PM   #42
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Originally Posted by 2013 Flat-4 REX View Post
For long trips I like to unhook my turbo and totally bypass its, tape the whole front end of my car up, like nascar, and run four donut spare tires for decreased rolling resistance. If I'm feeling motivated I'll take out an injector and grease my car for decreased drag on a real not I have a 2013 wrx and abs 25-26 in the summer. Winter time I have to much fun sliding around.
I love this guy!
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Old 03-08-2014, 08:40 PM   #43
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I love this guy!
I'm also working on a way to power my clock with a potato. This will reduce my electric needs and thus less drag from my alternator. It's currently in beta testing and I am taking preorders. No group buy you cheap A**holes. There's also some promising quantum things I'm looking into.
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Old 03-08-2014, 08:52 PM   #44
Razgeiz
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Originally Posted by 2013 Flat-4 REX View Post

I'm also working on a way to power my clock with a potato. This will reduce my electric needs and thus less drag from my alternator. It's currently in beta testing and I am taking preorders. No group buy you cheap A**holes. There's also some promising quantum things I'm looking into.
I call beta tester!

I ripped my alternator off and just employed an army of hamsters running on wheels in my trunk to recharge the battery
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Old 03-08-2014, 09:29 PM   #45
astr1x
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Is there a way to stay out of boost without a gauge? Thanks!
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Old 03-08-2014, 09:32 PM   #46
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Is there a way to stay out of boost without a gauge? Thanks!
Seat of your pants pretty much. With a Keen ear maybe you can hear the slight spool. But doubtful. Accelerate smooth and steadily.
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Old 03-08-2014, 09:38 PM   #47
Razgeiz
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Is there a way to stay out of boost without a gauge? Thanks!
Yes manually force your waste gate to be open all the time so your WRX is effectively N/A
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Old 03-08-2014, 11:53 PM   #48
elix_sf
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Originally Posted by the suicidal eggroll View Post
Staying out of boost is the key, that doesn't necessarily mean low RPM. Shifting at 2.5k RPM all the time will do nothing but make you frustrated at how slow your car is and make you hit the gas harder. I actually GAINED mileage when I started shifting higher. Believe it or not, the car will get better mpg in vacuum at 3.5k RPM than it will in boost at 2.5k RPM, even if it's making the same amount of power at the same speed. Shift higher. Don't be afraid of RPM, just stay out of boost. I will not up shift unless I'm above 3k RPM (or I'm between 2.5k-3k on a flat road with the cruise control set). I absolutely never up shift below 2.5k. What kind of mileage do I get? 22 mpg if it's about 75% city driving, 24-25 mpg if it's about 25% city driving, 27+ mpg highway. I have never gotten below 20 mpg on a tank, and I drive pretty hard. Usually it's around 22 because I spend most of my time in the city. Also, the mpg meter on the dash is INCREDIBLY inaccurate at first. It tends to "home in" on the final mpg about half way through the tank. I've had it report anywhere between 15 and 35 mpg in the first 10 miles, and it always ends up right around the same 22 in the end.
Doing this ever since! This works people!
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Old 03-09-2014, 10:53 AM   #49
BigRob74
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you guys are doing it wrong...,

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Old 03-10-2014, 12:47 AM   #50
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Originally Posted by the suicidal eggroll View Post
4) 93 does not burn hotter than 91, and 91 is not for protecting the engine. The octane rating essentially tells you how controllable the burn is. 87 is like the fire swamps in the princess bride, it's going to ignite somewhere, but you don't know when or where. 93 still sucks, but is better. Race gas is like a bunsen burner, you know exactly how it's burning, where it's burning, how hot it's burning, and where the flame front is moving. It's controllable, slower, and can you can get much more aggressive with the tune without the risk of the air/fuel mixture exploding for no damn reason during the compression stroke and blowing a hole through your piston.
Well put, lol.

It always cracks me up when people at the track say they "put a tank of race gas" in their basically stock factory tuned cars and are expecting it to run faster.
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