Horrible Gas Mpg

[clutch1]

Originally Posted by jayson_waltz

i don't get very good mileage either with the 2.4. about 16-17 around town. but your gas gauge could also be screwed up like mine. i can run with the neddle below empty for a couple of weeks.

Is it just me or is that simply terrible??

If I had a 4 cyl I would expect 20's at least. Jeez.. I'd expect that from a V8 or something.

Or am I just misguided?

[shiny alero]

i guess we just have bad ing luck lol

[[ion] C2]

IT'S JUST WINTER BLEND

Noticed my MPG lower too as winter happened.

[cavaliers60]

Dumb question, but how many O2 sensors are in our cars? one??? and where are they?? or it?

Originally Posted by cavaliers60

Dumb question, but how many O2 sensors are in our cars? one??? and where are they?? or it?

2 sensors........one near the cat and the other is about a little over a foot down on the rear exhaust manifold........it may be on the downpipe......but its right next to the firewall.....you will see it......

[shiny alero]

how much do 02 sensors cost

[eag182]

Originally Posted by [ion] C2

IT'S JUST WINTER BLEND

Noticed my MPG lower too as winter happened.

My ass it's just winter blend. I get identical mileage in summer and winter, and I dont live in an easy weather region. Don't drive like an idiot and take care of your car.

Originally Posted by shiny alero

how much do 02 sensors cost

for denso's your combined coats at autozone will prolly be around 150 before tax so figure about 160 but there are plenty other brands out there to choose from


agreed, winter blend my ass... if your getting 15mpg its not additives, they make sure that everything still burns the same, trust me, i know a guy who works for sunoco (hes a chemist) and at the most you'll usually lose less than 1mpg

[joealmighty13]

after my intake, my milage increased. To about 325 miles per tank. i have a 3.4 also. I also live in western new york so its pretty cold, but theres been no significant drop in my mpg. i average about 25MPG. Also a friend of mine got the CAI and full exhaust and he also saw an increase in milage. As for your problem billy, i would say check the o2 sensor as stated before and do an all around tune up. see if theres any change.

[Vinalero]

In winter, I always noticed some lost in my mpg on every car I owned.

My Regal did 425 km a tank in summer, 325-350 in winter
My Accord did 550-600 km in summer, 450 in winter
My Dynasty about same as Buick.

It may be a stupid comment, but warming up your car during winter use some spare gas, even if its only 2 minutes each time. 2+2+2+2+2... = $$$

[etan1987]

Ethanol in the gas lowers it also watch for that too.

[billytheman1188]

could my low mpg be because i need to get the LIM fixed??? i thought it was fixed, but the light started coming on again, so i gotta bring it in soon.

[protocol7]

My 2.4 5 speed gets 27 - 28 MPG city, 33 - 34 MPG highway.

I usually keep it below 2.5k RPM and accelerate WOT.

[alero168]

Originally Posted by Vinalero

It may be a stupid comment, but warming up your car during winter use some spare gas, even if its only 2 minutes each time. 2+2+2+2+2... = $$$

yeah warming up your car and using more electronic stuff like your front and rear defrosters. all these things make the engine work harder. so in spring when youre rolling down the windows you should probably have the best mileage. idk.

[jackal2000]

Originally Posted by El_Diablo

maybe this will work-

CHANG YOUR O2 SENSORS!!

care explain why? if an o2 is bad it will throw a code. i dont see how changing one good sensor for another will do jack.

[Mischief007]

Originally Posted by jackal2000

care explain why? if an o2 is bad it will throw a code. i dont see how changing one good sensor for another will do jack.

If you track your mileage, you might be able to tell. My Cavalier was running rich, due to the black smoke, and then a few days later threw an O2 code. I already had the sensor, just needed to replace it. Before one of my oil changes, my mileage dropped significantly. After the oil change and tuneup, back up. Who knows though. It could be a ton of things affecting the mileage.

i have a bad sensor right now (i know from testing it) and the only sensor its thrown so far is a rich condition and thats only happend for a couple minutes twice.... trust me, you can have a bad sensor without it downright failing

[natedawg9640]

Originally Posted by alero168

yeah warming up your car and using more electronic stuff like your front and rear defrosters. all these things make the engine work harder. so in spring when youre rolling down the windows you should probably have the best mileage. idk.

they tested that on myth busters... and the wind drag that having the windows rolled down causes as much fuel mileage drop as if you had the AC on and the windows up...

[jackal2000]

Originally Posted by El_Diablo

i have a bad sensor right now (i know from testing it) and the only sensor its thrown so far is a rich condition and thats only happend for a couple minutes twice.... trust me, you can have a bad sensor without it downright failing

how did you test it?

it threw a code!! hence, its bad.

[IRONDOG442]

Originally Posted by J-Henry

HI .

Change your front and rear O2 sensors.

This guy is right on the money... Screw the seafoam put in new O2 sensors....