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toyota81

How Good Is Your Corolla On Gas?

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I've seen worse mileage on other 4 cylinder cars - Corolla included. Buddy got his around 16-18MPG in the wintertime - O2 sensor checked out OK, but his injectors were starting to go. Ended up replaceing both injectors and O2 sensors, full tune-up (plugs, wires, cap/rotor, etc.) - power improved but the mileage only went up a hair. Summertime - he got in the upper 20s and mid 30s with mixed driving - go figure.

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mines terrible in the winter! i let it idle to warm up some before i leave, resulting in a wonderful 18mpg on my last go around. however thats ALL stop and go suburban traffic + long warmups. i think i need to change my thermo state, i dont think its closing fully.

Now that can't be right. Even when I drive a wide open throttle, I don't usually drop below 25 mpg. Idling for 15 minutes can't possibly halve your fuel economy. On most city commutes people idle half the time, but it doesn't mean their fuel economy dips that low, especially on small I4 engines. Maybe you have a bad 02 sensor. That can mess up your fuel economy alot.

nope, its running stoich in closed loop, its that it takes 15 minutes or so get to closed loop, and before then its running around 10-12:1.

 

Your thermostat is probably stuck open a little. Try replacing that. I don't think you can test to see if it is working right, but it is a really cheap part.

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i know its stuck open a little, i only noticed it in the last week or so when its been sooooooo cold. when it warms up to around freezing i'll replace it, its too cold to do it now!

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On average my 2002 Corolla S Auto gets 26 mpg street, and my latest trip from Ohio to SC got about 38 mpg. I have only had this car for a couple months with about 165k on it.

 

So not to bad overall.

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Covering up the front grille for winter (+40 to -40F) helps for quicker warmups and to achieve and maintain normal operating temperature, as does using a block heater. You are getting 0 miles per gallon while idling to warm up... My A/F mixture is cycling at a normal 14.7~15.1:1 right away upon cold starts, as shown by my wideband O2 sensor monitor.

I get about 30 miles per US gallon average in the worst wintery and snowy conditions, mostly city driving and even with all my intake/exhaust mods, etc. I can adjust for the ECU's overcompensating for colder denser ambient air with my Camcon, thus preventing a richer than ideal mixture at WOT during winter. Synthetic oil helps as well.

Edited by dom

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When my 05 LE was 2 weeks old, I got as far as 650 miles on one tank.

 

Of course, those days are over...

In Vegas, with 95% city driving, trips shorter than 20 miles, I average about 26 mpg. Highway still good with about 38-40 mpg.

 

No one gets good city gas mileage in Vegas.

 

how can you get 650?

 

I had an 05 LE automatic. the light went on and I had 430 miles. It was about 40 mpg that particular tank--and I only had at most 3 gallons left (120 miles).

 

So, 550 would be the max--unless you had extended fuel tanks.

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^^^ Possible but very difficult to obtain. Some owners were able to get over 600 miles on a single tank, risking your fuel pump life, but doable. One owner on the old 9thgencorolla forums posted a 661 mile tank. Hypermiling techniques, trip planning, etc. Poster on this forum was able to hit 40+ MPG in city driving only.

 

I don't see them getting that every trip out, but to be able to uncork one from time to time is possible. Best that I've ever got on my 8th gen was 606 miles on a single tank - 47 MPG on 12.9 gallons on a trip from Northeast OH to the Outer Banks NC. I usually shot for 450 miles on a tank (my weekly commute).

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^^ That's still some good mileage for an 8th gen about 34 mpg, but is your commute mainly highway or city. I am asking cause I need to find out how to up my mpgs. Bad economy plus crappy job equals even less money, so understandably tips for higher mileage would be great. And I guess mine is an 8.5 gen, technically.

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^^ I'd say probably 80/20 - highway/city mix. DC metro traffic, so there are periods where I'm hauling and periods of extensive idling. My 40 mile commute to or from work varies in time from as little as 45 minutes to 2 hours - depending on traffic. So my overall mileage gets me almost exactly a weeks worth of driving on a single tank of gas (5 x 80 miles + weekend travel) - makes it pretty convenient, fill up once a week.

 

I tend to plump my tires up with air - currently running 42 PSI on the Bridgestone Potenza RE960AS PP tires - reduces their rolling resistance quite a bit, but you have to balance that with traction and wear considerations - max cold inflation is 44PSI, so I have plenty of leeway. Run all synthetic fluids, and keep up with maintenance as best as I can.

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49-50mpg (Canadian gallons) on the highway. Drops to about 48 with the AC running and a full load of passengers and camping gear. Right now I'm getting 41-43 with the winter gasoline.

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