Gas Mileage
 

Hello all,

I could not find an appropriate heading to put this under. It's not a significant issue/any issue at all. It's more of a question/needing feedback.

I am averaging about 23.0 MPG. I do city driving so I presume that is normal for our cars. Others are claiming higher mileage. Yet they may be doing more highway driving. Anyone have input for me?

Thanks in advanced.

EPA rates the manual at 22 mpg city driving. Should have been on the sticker of the car.

http://www.fueleconomy.gov/feg/Power...-S&srchtyp=ymm

32 mpg. I'm mostly highway, though.

30 MPG avg. I mostly drive highway or streets that have 50+ speed limit.

HAHA. Duh, I should have known better. I have my window sticker at home. Thanks, man.

dam you get that high during city? I get like 10 in city

I've managed to go as low as 15MPG while driving in city, but that involved a whole tank of hooning...

I average about 22 MPG on city... gotten as high as 31 driving highway. I have a heavy foot and drive 70+ most of the time...

27.8MPG over 16000 miles tracking.

High of 34.6MPG, low of around 10.

This engine is thirsty for fuel under WOT for a NA 2.0L engine.

-alex

P.S. need to add some context. Non-OEM tires could add up to a 10% hit on gas mileage, same with minor engine mods. Also, your driving style also dictates your consumption.

I'm at 25.2mpg over 3000 miles.

I'm about 50% HWY (60-70mph typically) & 50% TOWN (25-40mph typically)

If I recall, the sticker on my car estimated 25mpg average, which is right on the money.

I do. It's at exactly 23.0 MPG. I drive like a grandma for the most part. Plus my car only has 6k on it.

10 in the city. Boy, you must be keep the foot on the floor! :party0030:

I get heavy footed as well (when I am feeling giddy). How do you like your 10 series?

you know what's funny, i'm tracking at 29.8 mpg on my car but 27.8 at the pump, over 8000 miles. i keep an excel spreadsheet of each of my fill-ups, and track the total # of gallons going in, and total # of miles driven. can't explain the difference. isn't evaporation, pretty sure i'm not like watering my car with gas... only explanation i have is that maybe the pump i use is faulty? i always use the same pump at the same station.

It is a thirsty little bugger with spirited driving. Definitely have some granny driving during most of my commuting.

Does anyone use 3rd gear going into turns intersections? I feel like 2nd gear should feel that way. Going into second seems quite like overkill in some turning situations.

I love it!

With stock tires rims and suspension I avg'd 28.6-29.4 50/50 city/highway. After rims lowered and shitty tires Im between 26.8-27.4. Take your mileage with a grain of salt and just have fun.

i get 19mpg and its majority city driving (I also have 80lb extra in the back for extra traction during winter)

I always use 2nd unless it's a larger sweeping turn. That said, there's no need for granny driving. All throttle control and driving smart.

Example:

Stop and go traffic, I never end up getting out of 1st or 2nd, but I also actually never stop. If I am stopped I let a sizable distance build up between me and the car ahead, so I'm always moving at a constant speed and never using my brakes. The commute time is always the same, but I don't need to be constantly on the brakes or gas.

Same with city driving, I just drive with the flow of traffic and rarely hit 50% throttle unless trying to merge.

-alex

I drive a mixture of both and get 28-29 but I would say more highway. And I also go on a lot of hills so I usually pop it into neutral

The computer in the car is always optimistic in my experience, and not just on this car. If you flip through the manual I believe most cars with the feature have a disclaimer that this reading is an approximation and may not be accurate.

Gas stations are calibrated at least once a year and your odometer is tied to your speedometer, I'd trust those over the onboard computer any day. Unless of course you've changed tire diameter which would throw off the speedo/odo.

Usually off by 2 mpg or so due to idle time. Whole reason I use Fuelly.

I was averaging 28-29 stock, then dropped a few with 18x9.5 wheels and larger tires. Tuned as well.

It's a beautiful color. If I had known that dual climate control, HIDs, and the other 86 goodies were going to be added to the Scion. I would have waited for sure. I love the car yet those added options make the car complete.

Absolutely agree. The car rejects going from 3rd to 2nd above a certain speed (have not looked to see exactly). I use the same strategy as you when driving around town. Spare some gas and brakes.

I imagine one should follow the computer over the odometer if you change the wheels and tires. Right?

Strange... I've down shifted to 2nd doing 40 MPH... I do heel toe every downshift.

Don't get me wrong...I can definitely drop to 2nd if I want. Yet I really enjoy smooth shifting during my commute to work (drive slow to work and fast home :lol:). I am still working on the whole heel toe down shifting. Just basic rev matching. Here's to more practice for me!

You're driving it wrong if you can't downshift into 2nd from any speed below ~50MPH.

-alex

Noooooo. I don't think so. It's hard to explain how it feels. I have downshifted into second at high speeds. Let's get back on topic.

I appreciate everyone's feedback thus far in regard to gas mileage. I knew it was normal for the car in general. Yet I know you guys keep track of it like I do. Therefore I wanted to see a comparison. Cheers.

Just saying, proper heel/toe while braking can always get me into any lower gear at redline.

2nd thru 4th possible, depending on my speed.

-alex

They would both be wrong.

My assumption is that the computer estimates fuel used based on the system that controls the injectors. No problem there (that's the gallons part of m.p.g.) 'I have this many injector pulses over this time step which equates to X amount of fuel per time step'

The 'miles' part of the mpg rating is based off of the speedometer/odometer which both function on the principle of 'I know how fast the output shaft of the transmission is turning (or possibly it uses the wheel speed sensors embedded in the ABS/TCS system), I know the circumference of the OEM wheel/tire setup, this is the resulting speed, distance traveled per time step' Changing the circumference of the tire means that this calculation will be different from reality.

Easiest way to adjust would be to plan a trip, reset the tripodometer and compare to google maps or something, say a 100 mile trip shows up as 110 miles on your odometer. You can carry that into your fuel calculations to make it more accurate, in this case you would subtract 10% off the mileage for each tank (268 miles on the odo is actually 242 miles). For instance it's well known that my truck is off by about 8%, lots of posts on the forums about it.

Another trick is to set your cruise control for 60 mph and watch for mile markers on the freeway, you can watch the odometer or pull out a stopwatch, you should click off 1 mile every minute consistent with the markers on the side of the road.

But the reality is you would have to make a pretty big change to the wheel setup to really affect your odometer/speedometer, but the variation exists nonetheless. Odds are unless you're building a showcar (20" rimz yo) it won't matter. It really only counts for armchair engineers and spreadsheet fanatics, just a fun idea to kick around.

Back in high school when i worked at a gas station our pumps were calibrated to 15deg C (59F). Due to this you actually get more fuel under 15 (the fuel has a higher density/gallon) and less fuel if its over 15 deg out (lower density/gallon). I don't know if this is enough to explain the discrepancy but its a theory.

In the summer, for DD, I average around 34-35. In this polar vortex nonsense I'm right around 30-31. Hand calculated.

I also noticed the mpg display is optimistic by a good 1-2 mpg. Consistently.

I actually calibrate the odometer - I'll run 50 miles on marked highway/interstate and compare that to the odo and see how far off it is. This helps account for different tire sizes. I've found the stock calibration isn't far off but there is a difference with different tire sizes (225/45-17) - not a lot, but if you're being anal about it it can shift the numbers a bit.

8.1l /100km lifetime average w 31k km on the car. aka good mix of HW and street