thank ethanol. in the winter the states (at least NY does) require 15% ethanol in an effort to reduce emissions. cars definitely do NOT get as good gas mileage during this time.

my gas mileage has gone down some, but that's mainly b/c I drive too fast.

 

today i got the worst mpg yet to date. I it was like 19.4, 19.3 or sumthin like that

 

mm so oil effects MPG, like recently change, as well as quality... interested, alot to learn, btw, my pressure on my tires are fine because during the oil change, i told them can they adjust it for me since it's colder up here now, and they said they did, my mpg just got to around 26 for the particular tank i filled up.

thanx for all the info, will keep everything in mind that effect my mileage per gallon ^^, someone should perform a multiple regression on relation of what effects MPG XD. someone with a great knowledge of stat could do it

 

i get everything from
12-32mpg

with all sorts of driving

jus fyi if u wanted to compare :D

 

I noticed mid twenties on my gas mileage, with a mixture of town and highway miles. I drive about 73 miles one-way to work. This weekend I averaged 21mg on a tank of gas. That sucks, man. I traded in a Ford Taurus for this car and it got better gas mileage. I set my cruise at 80mph and except for the occasional jerk truck drivers and old people, it pretty much stays on cruise control. I'm not sure what is going on. Wondering if I need to pull the psitive side of the battery and let the ECM reset itself and recalibrate. Any ideas? Thanks.

 

pedsnrs-
mid 20's is about what i am getting in the winter as well.. 25-26 mixed hwy/city..

could be the winter gas they gave you in missouri.. and you've had warmer temps, that wouldn't be good for fuel economy as far as i know.. that could've been the drop too.. haven't seen that drop up here in michigan since it hasnt' gotten that warm.. something to think about..

 

i just filled up and im gonna drive as fuel efficent as possible to see if it really is juat my driving habits thats causeing my bad mileage. in this car cruiseing at 80 mph isnt too great on gas... going down to 70 or 65 saves like 20% more fuel

 

As of my last fill-up I'm averaging 27.6 MPG with 2909 miles on the car since 12/31/05.

The last tank was 25.5 MPG.

My best was 30.4 MPG at 2126 miles on the clock and the worst was 25.5.

This is mixed driving, mostly highway, but a fair bit of around town stuff. Let's call it 25% city and 75% highway.

I use the cruise control a fair bit and babied the car the first 1000 miles. Rarely over 4000 RPMs in that first 1000 miles, varied the speeds on the highway from 55 to 80+ MPH, etc.

I'd say speed is the number one factor in fuel economy. But prevailing winds, temperatures, car maintenance including tire pressures and how much junk you are hauling around all play a part.

I believe drag increases as a square of velocity, so if you double the speed of your vehicle, drag increase 4x, IIRC.

So if you want max fuel economy, maintain your car, gentle acceleration and anticipate stops so you are not on the gas right up to the stop sign or light, and keep your speed around 55-60 MPH.

Oh, and for the really ****, ditch the 17" wheels for 16" wheels with a narrower tire. Lighten the rotating mass at each corner and put a narrower tire that will have a lower rolling resistance.

The EPA figures are typically about 10 - 20% lower than the theoretical max MPG you can get with your car. So if you drive right, you should be able to beat those numbers consistently.

Of course, it may not be as much fun, LOL

 

My first tank was around 29, close to 30 because it was almost all highway. Second tank, including a little bit of city driving, went down to around 26 mpg. But overall, i'm hoping it wont drop lower than that. I drive it pretty moderately seeing how i'm trying to break the car in, i normally stay in the low 2000's rpm.
________
TOYOTA F ENGINE

 

i havent been keeping track. i guess most cars lose gas mileage anyway right?

 

i'm not aware that cars eat more gas as it gets older, but i guess it makes sense. i only filled my car up twice since i got it. first tank i got 27 mpg, and second i got 25. i don't think i'm pushing the car harder but it seems like i'm not getting as good of mileage as i did on my first tank. maybe my salesman topped off the gas when he filled up the tank before i got my hands on it.

one thing that happened is my dad drove it on "3" (i have auto) for about 6 miles at 55-60mph. it was reving at 3500rpm i believe. do you guys think this would hurt the car during the break in period? doesn't sound too bad but i'm over causious and worry too much about this "break in" stuff. i'm hoping the mileage will increase a bit after break in, atleast 25 mpg for mix driving moderately. it is tempting not to push it somtimes, haha

 

.

Absolutley not. If you had a 5speed, it would have been at that RPM anyway.

 

first fill up i got 27mpg, 2nd 25, 3rd (today) i calculated just over 23mpg. i'm keeping track of my mpg just to see how my average will be with the tC. too bad it doesn't have better gas mileage. it's disappointing to see V6 engines have better mpg than a 2.4 liter. the tc is so much lighter, less pwerful with a smaller engine, and yet we use more gas. i understand that the gears are shorter, but atleast for the last gear it should be well longer than the others considering it's used for cruising on highways. let me get under 2000 rpms @70mph. i don't mind not acclerating fast on highways...

 

3k at 80mph would be perfect for me. Then again that would only happen with 6 gears

 

yea my rsx does the same thing too

 

My car started @ close to 30mpg on stock,
-after trd strut & Spring , pretty much same gas milage,
-after nav, amps sub woofer installed, a high 20s mpg due to heavier weight.
-Once I got 18"s on, the gas milage droppped a bit more to mid sometimes even
lower 20s mpg. I later found out it takes more power to roate the bigger wheel
........ duh
- Then I change my TRD strut & Spring to Tein SSP w/EDFC, the gas milage dropped again
- I figured it was something electrical, added on 4 gauge gounding kit, gas milage went back up close to mid 20s range
- Stoptech Stage 2 kit was installed, lighter rotors gave me a even better milage closing to 26/7 mpg
- I wasn't happy with the gas milage, and my remote start (happens on all Toyota cars and trucks ) won't always start at first try. I changed my stock battery out to a deep cycle stinger SP 1000 red top. Problem was solved, no more failure for remote start and quick charge on battery + bigger cranking amps for ignition gas milage went back up closer to 30mph(28/29)

My point is every different scenarios and mods matters to gas milage.

 

Hi Rawr,

I would suggest that you check your tires by yourself also. I had my oil changed by a shop once and on the invoice it said the tire pressure was adjusted. 3 tires were correctly pressurized at 35psi and the rear right tire was at 20psi! This is a RWD car too, so it was very dangerous. (My car is a RWD, not referring to the TC, which is FWD)

 

A month later and I have more data.

Currently the tC has 3936 miles on the clock, so another 1k in the past 30 days.

The tank ending at 3504 miles was 31.5 MPG, while the tank ending at 3727 was only 25.1 MPG.

Current running average is 27.7 MPG, so I'm seeing a bit of improvement, but probably not statistically meaninful.

I changed the oil at 3926 to Mobil 1 5W30 and used a Wix filter. I doubt I will be able to see any noticable improvement.

I'll let you all know in a month or so

 

After 41000 miles, I've noticed that highway travel will greatly increase the mpg numbers of the tC. I got 28.8 mpg on my last tank, which consist of mostly highway travel. The numbers dip to about 23 mpg when it's mostly city.

 

Ditto. I've gotten over 32 mpg when crusing on the highway at about 70 mph and as low as 24 when driving like an idiot.

You need to tune your car up (tires, alignment, oil, etc) and lose some weight on the rigt foot if you want good gas milage.