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Water.....sometimes waves
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Discussion Starter · #1 ·
Well guys (& gals) I ran my car for 35 miles after the low-gas light came on. Display showed 40 miles available when I got home to my gas can. And the trip meter read 521 miles.

MPG on the display was reading 38.4. This is not unusual for me but this time it "seemed" to coincide with my turning off the traction control most of the time.

From everything I read and understand, this should make no difference in fuel mileage. But still it makes me wonder since I am so consistent in the way I drive. Does anyone think it is actually possible that traction control really does affect fuel mileage?

My mpg "seemed" to increase about 1/2 mpg, or 1.5%.
 

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I'm in for more thoughts on the traction control correlation. Have you ever tried the same thing but with traction control ON? (driving as economically as possible for high MPG)
 

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Water.....sometimes waves
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Discussion Starter · #7 ·
Nope. Not cruising at 50-60 completely. Half my 35 mile drive each way to work (what 99% of my miles come from) is a 55mph country road and half is a 65mph 4-lane. I go 5 over on each. 3 small towns and several stop signs and lights in there. 4EverMetal is probably closest -- compared to most WRX drivers I probably would be considered a Grandpa driver. (Not grandma - e.g. little old lady from pasadena.)

Up until that tank I always drove with the traction controls all active. But all last summer (with traction controls all on) I got very similar mpg as this tank. What it seems like is that all of a sudden the gas station I use, got different gas. But why in middle of the summer? It seems like a formula change from winter gas to summer gas when my mpg always goes up. But it makes no sense in the middle of the summer.

And the only thing I can think of that is different is that I have been switching the traction control off each start-up this tank. ????????

(Oh and I do run 93 octane with no ethanol, but I have been doing that since day 1)
 

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Thx for the extra info. Better gas FTW!

Only other thing I can think of, is seasonally some gas tanks get extra condensation from the overnight cold/warm temperature fluctuations, especially if they're kept at a low level or near empty for more than a day or two. But, I still doubt that's enough to affect MPG this seriously. Enjoy it while you got it!

EDIT: So jealous of you lucky bastards with 93 gas!
 

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Really late reply (woo thanks late email newsletter lol), but I did 330~ miles to South Jersey in June in a smidge over a half a tank in a 2016 WRX with the traction control stuff on. Indeed using 93 as well (10%~ ethanol but can't really get anything other in this part of PA).
 

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Æternum
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Tank is 15.9 gallons. If you ran it bone dry, it would be 32mpg, which is not unheard of on the new platform. It's high, but not impossible either.

Sent from my SAMSUNG-SM-G890A using Tapatalk
 

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Yeah PA turnpike to Jersey from where I am in the state is largely just 75-85mph cruising on mostly flat level. At one point between stops my car actually read about 70MPG on the display lol, I immediately felt dumb for not taking a picture at the next stop before shutting the engine off.

For what it's worth though this is also rolling Cobb's Stage 2 w/ a Stage2+93 mapping as well
 

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Water.....sometimes waves
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Discussion Starter · #14 ·
So I mentioned "getting home to my gas can." Each fill-up I buy a couple 6-gallon cans also so I don't have to stop at the gas station as often. Well, after my 2 cans ran out and I stopped at the station for more 2 days ago. I entered quantity and odometer numbers into fuelly and it came out 34.9mpg. The display on the car was reading 38.5.

I was still turning off the traction controls. Still doing that and so far on this tank the display on the car is reading 39.0. I think I will immediately now stop turning off the traction controls and see if it stays so high. If so, then I must conclude it is a gasoline quality thing at the station I always use. I want to think it has to do with the traction control because that would then mean I can control it, but reality may be just gas source differences. We will soon see.............
 

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Administrator ...De Rerum Natura
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Nice!
 

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I Drink & I Know Things
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521, wow! I fill up at exactly half that each and every time. I'd be thrilled with 23MPG at this point. After about 20 months of ownership I'm still stuck at 20.9MPG overall. If the motor had a bit more performance I could forgive it. Oh well. My commute must be even worse than I thought.


Sent from my iPhone using Tapatalk
 

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So I mentioned "getting home to my gas can." Each fill-up I buy a couple 6-gallon cans also so I don't have to stop at the gas station as often. Well, after my 2 cans ran out and I stopped at the station for more 2 days ago. I entered quantity and odometer numbers into fuelly and it came out 34.9mpg. The display on the car was reading 38.5.

I was still turning off the traction controls. Still doing that and so far on this tank the display on the car is reading 39.0. I think I will immediately now stop turning off the traction controls and see if it stays so high. If so, then I must conclude it is a gasoline quality thing at the station I always use. I want to think it has to do with the traction control because that would then mean I can control it, but reality may be just gas source differences. We will soon see.............
Check the pumps next time, see if there is any mention of ethanol being used at the station you get from that seems like it's getting better milage?
 
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