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Old 03-04-2013, 08:52 AM   #1
TryHonesty
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Question Need some 2013 WRX MPG tips

  • 2013 WRX
  • ~1.2k Miles total
  • Completely stock
  • Full tank of gas
  • Empty trunk
  • ~3PSI above the door jamb for the tires
  • 93 Octane

I reset the trip odometer. I took the car for a 10 mile drive today to test out tips that people have given me. I've not launched the car. I've shifted around 2500 RPM for every shift. I never had the car above 3k RPM the whole trip. After 10 miles of city driving, I'm sitting at 17MPG. I would say I hit about ~20 red lights and 6 stop signs or so.

I don't mind about the MPG THAT much, as I didn't buy the car for the MPG, but I'm curious how others report such high MPG during city driving like.
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Old 03-04-2013, 08:59 AM   #2
Mr Wrex
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I noticed a LOT more mpg when I went stage 2 and drove it like a grandma. Also, if you're using winter tires still (which I hope you are...), then those will kill your mpg quite a bit. FWIW, 17mpg is what I get in my TP stage 3ish wrx when I floor it half the time.
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Old 03-04-2013, 09:01 AM   #3
Loyale93
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City driving is the worst thing you can do.

http://forums.nasioc.com/forums/show....php?t=2475350
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Old 03-04-2013, 09:04 AM   #4
fmauriwrx
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I don't drive in a city, more like suburban/rural-ish, but what I have been doing to experiment is setting the MPH to 40~41 and setting it on cruise control. I am getting between 25-29 MPG, although I don't run into many stop lights/signs.
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Old 03-04-2013, 09:04 AM   #5
TryHonesty
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I've no experience with the AccessPort. I'm wonder if maybe the stage 1 tune will increase MPG at all?
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Old 03-04-2013, 09:04 AM   #6
vision.dynamix
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Step 1. Buy a different car.
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Old 03-04-2013, 09:09 AM   #7
Mr Wrex
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Quote:
Originally Posted by vision.dynamix View Post
Step 1. Buy a different car.
Figured you'd be the one to say this
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Old 03-04-2013, 09:12 AM   #8
vision.dynamix
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Loyale93 is going to yell at me because I forgot steps 2 and 3.

Step 2: ???
Step 3: profit!
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Old 03-04-2013, 09:30 AM   #9
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1. Use 5w30 oil - EP Mobil 1 changed every 3000 w/oil filter for a daily driver is fine.

2. Purchase a Cobb AcessPort, and flash to Stage 1.

Driving like a grandma, I get about 20 mpg (combination, mostly rural) in "Intelligent" mode.
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Old 03-04-2013, 09:37 AM   #10
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Did you do your test from a cold start? If so, remember that a cold engine uses a lot more fuel.
Every time you stop, you are getting zero MPG. Stop lights and stop signs will kill your mileage. I'm not suggesting you blow through them, just stating a fact.
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Old 03-04-2013, 10:33 AM   #11
TryHonesty
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Quote:
Originally Posted by SpamBot View Post
Did you do your test from a cold start? If so, remember that a cold engine uses a lot more fuel.
Every time you stop, you are getting zero MPG. Stop lights and stop signs will kill your mileage. I'm not suggesting you blow through them, just stating a fact.
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.
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Old 03-04-2013, 10:44 AM   #12
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1. Sell car as used late model Subarus go for a shocking premium these days.
2. Buy a car with decent MPG ratings as even if you google the term "hypermiler tips" and review every Toyota Prius forum for weeks on end, you will end up saving 9 cents in fuel costs with your current car.
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Old 03-04-2013, 12:12 PM   #13
SWP n Gold
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Quote:
Originally Posted by TryHonesty View Post
  • 2013 WRX
  • ~1.2k Miles total
  • Completely stock
  • Full tank of gas
  • Empty trunk
  • ~3PSI above the door jamb for the tires
  • 93 Octane

I reset the trip odometer. I took the car for a 10 mile drive today to test out tips that people have given me. I've not launched the car. I've shifted around 2500 RPM for every shift. I never had the car above 3k RPM the whole trip. After 10 miles of city driving, I'm sitting at 17MPG. I would say I hit about ~20 red lights and 6 stop signs or so.

I don't mind about the MPG THAT much, as I didn't buy the car for the MPG, but I'm curious how others report such high MPG during city driving like.
You're not really going to get much better than that for city driving. The WRX is rated at 18-19mpg in the city so that's why you're getting the mileage you're getting. I had a commute that allowed me to be in 4th-5th gear and 45-50mph the whole time and I got 26mpg so it depends on your commute. City driving = low mileage for these cars.
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Old 03-04-2013, 12:59 PM   #14
ruslan_pbp
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Yea man, I get about 27 on highway, going 65-70mph. in the city I am more like 19. It is always warm down here so may be this helps.
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Old 03-04-2013, 01:06 PM   #15
BlueDevilFXT
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It's also a new engine, and mileage will improve once it's got several thousand miles on it.
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Old 03-04-2013, 01:09 PM   #16
the suicidal eggroll
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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.

Last edited by the suicidal eggroll; 03-04-2013 at 01:14 PM.
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Old 03-04-2013, 01:15 PM   #17
snowboarder2587
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Quote:
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.

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.

^^^This I gained a decent bit mroe MPGs when I started watching the boost pressure(I use a scan guage to monitor boost and AFR). You can see how shifting too early may cause you to use much more fuel
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Old 03-04-2013, 01:15 PM   #18
guroove
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Driving to get good gas mileage is not the best way to break in a new motor. At 1,200 miles, it's still breaking in, despite what the manual says. Fuel economy will improve when you've gotten some more miles on it. For now, drive it hard, rev it high, and use lots of engine braking going down hills.
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Old 03-04-2013, 01:22 PM   #19
the suicidal eggroll
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Quote:
Originally Posted by guroove View Post
Driving to get good gas mileage is not the best way to break in a new motor. At 1,200 miles, it's still breaking in, despite what the manual says. Fuel economy will improve when you've gotten some more miles on it. For now, drive it hard, rev it high, and use lots of engine braking going down hills.
^ this

You should have been giving it boost since day 1. Babying it since birth won't seat the rings, which means compression will be low and gas mileage will suck.
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Old 03-04-2013, 01:42 PM   #20
TryHonesty
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Thank you all for the wonderful support. I never babied the car to the first 1k, I've hit the boost many times here and there, but never launched the car.

I think I'm going to get the AP and get the boost gauge so I can monitor my driving to learn bad habits that are putting me into boost constantly.

Thank you everyone!
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Old 03-04-2013, 02:38 PM   #21
AFP520
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Don't forget that it's still cold here. Once it warms up the MPG should go up too.
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Old 03-04-2013, 03:02 PM   #22
Vit0r
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Don't feel so bad, base 2013 wrx I average 17.8 after 1100 miles. NYC though so its stop lights on every corner.
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Old 03-04-2013, 03:39 PM   #23
Jack
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I'm not going to tell YOU how to do it. In my 08 LGT, I got 27-28 combined commute/highway mileage by:

using 87 octane
run most of the time in I mode
turning the car off on long downhills
45psi in the tires
lots of cruise control use and since I was driving for work, it was at 60mph.
Change the oil regularly (although I used 10W 30 synthetic always)
Get off the gas as soon as I see a red light ahead
Paint the front of my car with awesomeness
cause Uncle Scotty to have a coronary many, many times
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Old 03-04-2013, 04:38 PM   #24
MWRX13
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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.
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Old 03-04-2013, 04:49 PM   #25
luan87us
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I'm getting 21.9 MPG average according to my trip computer. It is mixed of about 50/50 driving. I usually shift around ~3k rpm. Shifting @ ~2.5k drops the rpm down too low and the engine will have to work harder. I oscasionally perform freeway entrance pull and what not.
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