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01-18-2009, 08:30 PM | #1 |
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Interesting website to compare fuel economy
I was wondering if I'm getting the right mileage out of my car.
So, I started recording my fuel economy on www.fuelly.com. Being stock except 245mm wide tires, I could barely get about 350km out of a tank of gas. And the website converted to 19.0 MPG when I ran a full tank of gas with no boost the entire time. Would you say this is common among stock STI's? Thank you!
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01-18-2009, 08:48 PM | #2 |
Scooby Specialist
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I think that is a little low. Do you drive hard?
What kind of gas are you putting in? |
01-18-2009, 09:01 PM | #3 |
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I get about around 400 - 450 km on one full tank if I don't drive hard.
how often are you driving on the hwy/city? |
01-18-2009, 09:02 PM | #4 | |
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Quote:
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01-18-2009, 11:04 PM | #5 |
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I'm pretty steady at 19mpg around town I use the accufuel app for the iPhone
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01-18-2009, 11:38 PM | #6 |
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seems like an interesting site...
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01-19-2009, 02:05 AM | #7 |
Scooby Specialist
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I get about 400 km/tank. I'm running an AP tuned on 94.
My cars fuel mileage has been about the same since I bought the car. |
01-19-2009, 02:48 AM | #8 |
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My car sucks on gas. I think it has something to do with my heavy right foot. Boost is addictive.
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01-19-2009, 03:01 AM | #9 |
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Seems perfectly fine.... but then again I can have a toyota tercel and say I get only 200 km on a tank if I drive in downtown all day. But when I hit the highway it's a totally different story.
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01-19-2009, 10:41 AM | #10 |
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I get about 200 miles out of a tank before I actually fill up.
It's always pretty much right on 1/2 at the 100 mile mark. The low fuel light is on now because I have been waiting for the price of gas to come down but it's actually going up here in Kelowna... ****ing brutal. The price of oil has dropped to below $35 but the price of gas is going up??? F That! Anyways, the max I can get out of a tank is probably around 220-230 miles which translates to around 350km! I'm stage 2 (94) with CAI on my 06 STI. So yours seems normal! Edit, if you want more specific info on STI's I highly recommend you go to www.iwsti.com! Cheers, Jay |
01-19-2009, 11:05 AM | #11 | |
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01-19-2009, 12:38 PM | #12 |
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I've been driving with no boost on 91 octane.
Each 1/4 of the tank is good for about 50 miles...lol It's true that approximately 80% of my driving was in city as well. I was wondering if having 94 octane will actually optimize the ignition timing to get better mileage. It's just that I use Esso card to get 3% extra discount, but they don't have 94. |
01-19-2009, 01:18 PM | #13 | |
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Quote:
19 mpg sounds okay for an STi, but do try to keep a better record of the fuel usage and the mileage. The I get XXX miles to the tank isn't very accurate. |
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01-19-2009, 02:14 PM | #14 |
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01-19-2009, 02:48 PM | #15 |
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From what I understand about the octane is that the higher octanes are a slower burning mixture, where as the lower octanes are more volatile. This actually means the lower octane gas can produce slightly more power if everything else is kept the same.
http://wiki.answers.com/Q/Will_using...er-gallon_rate |
01-19-2009, 02:52 PM | #16 |
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ah that wiki answer went from yes to no with everything in between.
I will say, lower octane vs higher octane is all in the tune. tuned for higher can net better mileage, only reason we don't see it is who tunes a car to run higher octane for anything but power. better power can come from a better tune showing a more efficient car, gaining better mileage. thats my theory until proven incredibly wrong. |
01-19-2009, 04:14 PM | #17 | ||
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Quote:
Quote:
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01-19-2009, 04:42 PM | #18 |
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well, actually the first answer to the question does, but I get your point.
mileage still is dependant on your right foot, mine is set to power! |
01-19-2009, 05:22 PM | #19 | |
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Quote:
If that were actually true, every tuner in the world has been pulling our legs and 100oct race gas is the biggest conspiracy theory ever in the history of racing! |
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01-19-2009, 05:50 PM | #20 |
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Ah, but as I said before with everything else being the same (timing/fueling) lower octanes actual produces more power. By using high octane that means we can run more timing and whatnot to generate more power without knock and destroys the engine
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01-19-2009, 06:07 PM | #21 |
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Yea, but... You CAN make more power with higher octane fuel then you can with lower octane fuel, and you can drive it with less gas pedal, thus possibly getting more MPG. Now if you actually use the extra power to go faster that's different. If you don't tune for it THEN yes, it's a waste and you won't gain anything...Either power or fuel mileage.
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01-19-2009, 07:08 PM | #22 |
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try switching gas stations. I highly recommend putting in Chevron 92 instead.
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01-20-2009, 06:28 PM | #23 | |
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Quote:
Lower octane doesn't necessarily produce more power, it just so usually happens that our pump gases have a mixture of chemicals that often have a slightly lower energy per unit volume, and we measure gas mileage in volume (opposed to weight, where some substances that have a lower energy per unit volume can have higher energy per unit weight). |
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01-20-2009, 11:14 PM | #24 |
Scooby Newbie
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Thank you very much everyone for your inputs!
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