xlayedoutx

I've had my car coming up on 2 months and I'm getting a 15.8 average MPG. I live 1.5 miles from work so I'm pretty sure that has something to do with the low MPG.

kevinb120

Are you really measuing it or using the compter one. Reset it on the highway and your in the 30s! Personally I never keep track of that stuff with a 4 mile commute to work.

DaddyJ

About 3200 into my GT/CS. Commute is about 37 miles each way, kinda combo of in town and urban highway.

I'm averaging just over 20 when I resist the reset urge ....but I have seen as high as 24.7 and as low as 17.6 on this loop. Most of the time less than 1/2 throttle is all it takes to make the casually annoying masses disappear in the rearview....

That all said, I've found the best way to get better gas mileage is to stop buffing the back of the throttle pedal with the carpeting on the floor... ......

RobK

42 highway (most of my driving).

stangster

Are you only driving downhill???

Best I have ever gotten is 27.6, average is 22.7

kevinb120

Mine is shiney already!

You can't really measure highway/city mileage, the computer thingie is not real information. You can only manually measure total gas mileage by the ODO and fill-ups.

RobK

I'm still driving my Corolla...

Speeddmn

I get tank-per-week-ish I live 2 miles from work, and then drive 30 miles oppsite way to get the kid at day care.

I didn'y get the car for milege....

Matty27x

haha. me either. i'm avg 16.4 according to the computer. everytime i open her up i wave bye bye to my mileage, but i have a grin ear to ear doing it!

BLoG

I get a pathetic 16-17mpg generally on my 17 mile commute, but it's better than my lightning

Honestly i was hoping it would be a LOT better than the lightning though

4700lb brick-shaped truck, 4.10 gears, 4 speed auto, 5.8 ohv w/supercharger & barely tuned running pig rich got 12-14mpg

3700lb car, 3.31 gears, 5 speed auto, 4.6 sohc n/a getting 16-17.

The only explanation I can think of is that I'm probably going a lot faster in the car and not noticing it. The truck acts like it's breaking the sound barrier when I'm going 70 so I don't go much faster than that.

mdcorny

I can't keep my foot off her, and I'm getting almost 15 mpg. At least it's better than the 13 mpg I was getting in my '04 Mach 1.

DoctorQ

No doubt. I noticed on short trips (5min city driving), mpg is around 15-16. However, on a 30min trip (city driving), mpg is up around 18-19. A mix of highway and city, I'm averaging ~ 21mg. When the car is started, it is in "open loop" and mix is more rich... takes some time for O2 sensors to heat up so it can hand of A/F mix to ECM. Got this off another forum, but pretty good explanation on "Closed Loop" vs "Open Loop".


Open Loop and Closed Loop are two terms used to describe the fueling mode the computer is in.

In closed loop fueling, the computer takes readings from the oxygen sensors which read +/- of 14.64 AFR (Stoich) and makes corrections for it. If your car is idling @ 13.5 AFR, the 02s can see this, and will know to pull out enough fuel to get back to stoich.

In open loop, the fueling is purely based off the MAF transfer function and the open loop fuel table. This table has to be calibrated any time you make MAF changes, and changes that affect the airflow of the MAF.

When a car is started, the computer is in open loop until certain criteria is met. The o2 sensors need to be heated to work properly, so this is the main reason there is a delay.

After the sensors are heated up, the car goes into closed loop and the O2 sensors make their corrections.

The computer will go back into open loop under a variety of conditions. Throttle Position (TP) is one way.

There are parameters in the computer that determine what the TP is for Open Loop, and other things.

When that TP is reached, and the car goes open loop, and richens up.

davisinla

Except for a 55 mile commute each way, my experience is almost identical to Daddy's. Seems like with these cars, there's a BIG difference between comfortable freeway commuting, and driving on city streets/stop and go/red light racin'.

steevr

Cody,

With that short of a commute, anything your drive except a Prius will get crap mileage. Trust me, I live 1.5 miles from work. The real killer is the winter with both my daily drivers sitting outside all night.

My '97 Lincoln Continental gets around 13-14 for my daily commute. I can get low to mid 20's on a long highway drive. My V6 RX300 gets around 16 back and forth to work. My wife's V8 GX470 gets better mileage than my RX300, but her commute is 25 miles one way with some of it being highway miles.

Bennyandthejets

I'm proud to say I get absolute k rap mileage. This is my fault and I pay for...but there's never a dull moment. Long live American Muscle.

simple06

I get 18 mpg around town in addition to my 34 mile total commute. On a strict highway road trip I get 26 mpg.

Indystang

21.7 MPG w/mostly, country/rural driving here. Its getting better now that the weather is warming up.

metroplex

My very first fillup was 3.8 miles per gallon!! I guess it had something to do with the 2 black lines I left at the dealership.

screamingGT

Right now I'm getting 12.XX MPG. I really need to learn to lay off it, it's getting ridiculous.


But oh boy is it worth it

vistablue mustang

I was averaging 13 in my V6 last year driving all city miles and sometimes going too fast. When I got my magnaflow muffler put on my gas mileage went up to 17.5 driving the same. I have no idea what my GT will get but I doubt it will be good.