im usually between 250-275...but i dont let it go below 1/4 thank tho...

 

After reading this thread I don't feel so badly. I just bought a 2006 xB with only 6000 miles on it. My first tank got me 29.7 MPG. I was expecting at least 31.

I'm wondering what to look at besides tire pressures?

Kerry

 

I have kept track of my mpg for the past 13,000 miles since new, and in the summer it averages 35 mpg:
http://aatherton06.home.insightbb.co..._xB/xB_MPG.htm
I find the mpg is dependent on how and where I drive, as you would expect. Aggressive stop and go city driving and fast aggressive urban interstate driving, can result in summer mpgs below 30. And winter blend gas plus short hop errands where the engine can't stay at 185F for long, can drop the mpg another 5 mpg in cold climates in winter.
I see no secrets to good mpg, just common sense. Use minimum rpms and speed, shift early and often. Use light throttle, upshift at 2000, get into 5th by 40 mph, stay with the slowest and least aggressive drivers around you. The better the mpg, the less fun the driving is.

 

I just got my beautiful blue '06 xb a month ago (it had 15k miles and its an automatic) and I've filled the tank 3 times (after the light goes on and I don't top off the tank):
1st fill - 9.5 gallons, 220 miles
2nd fill - 9.3 gallons, 200 miles
3rd fill - 9.4 gallons, 210 miles.
Each time using 87 octane at Mobil.
That averages out to only a little over 22mpg. Most of my driving is in the city, and when I am on the freeway there is usually stop and go traffic. (Its Los Angeles - what you gonna do?) So, what am I doing wrong? The only significant mod I've done is new wheels (18" chrome, so sweet), so tire pressure isn't an issue. And I drive insanely conservatively. (For example, I live on very slow street and I'll often kill the engine at 30mph 6 blocks from my house and try to time the coasting so that I stop in my driveway without hitting the brakes - I actually did it perfect once)

Any thoughts...

 

A bit disappointing because it was a tossup, to get a 1st Gen xB that reportedly gets 34, as has my '97 Saturn SC1 these past 7 ten years, or get the 2008 xB. The choice to get a used one was solely based upon the gas mileage. So 29.7 is not that much better. Given that it only has 6200 miles on it there's not much I can do. With the first tank of gas I made the same trips at the same speeds and traffic conditions as I have been doing with the Saturn so there's not much room for me to improve my driving habits. The one thing I can do is ensure the tires are at their best for mileage pressure.

I have been planning on removing my spare tire so I'll post the results.

Thanks,

Kerry

 

Hi jasonsxb,

Stock air filter, spark plugs? I ask because once when I had a new low mileage used car I immediately replaced the plugs even though they didn't need replacing. I believe I replaced them with Platinum Plus type plugs and a set of top of the line spk plug wires. After a few tanks and low MPG and some testing and research I discovered that the Saturn's onboard computer was set up for the resistances of the OEM parts. The different resistances of the new wires and plugs caused minor problems for the O2, IMAP, and other sensors.

No doubt members here will have more thoughts and ideas. Good luck.

Kerry

 

Yup. No engine mods done at all. I have zero mechanical skills. I'm not even sure how to check the oil level.

 

Looks like we're in the same boat, only I'd really be worried with 22 MPG. For certain I'd take it to the Toyota Service Dept. The original owner's warranty was transferred to me. I had to send in the Owner Transfer forms at the back of the owner's service records booklet.
22 MPG indicates that something's not working correctly.

Good luck,

Kerry

 

Are your new tires the proper circumferance? Meaning a 205/35-18 tire is too small giving you less mileage. I use a "scan gauge 2" to improve my driving style and mileage to 34mpg.

 

What's a "scan gauge 2"? Edited: Got it! http://www.scangauge.com/

My tires, which I assumed to be OEMs, are Goodyear Eagle LS, P185/60R15. OK? With only 6200 miles they look to be new.

Kerry

 

Jasonsxb.... I get almost exactly the gas mileage you get. My average is a little over 23 mpg. I also have an o6 xb. I am ____ed about my gas mileage. It's good to see someone that posts some numbers that compare to mine. I still think there is something wrong with it. I drove it off the lot brand new a year ago. I am the only one that has driven it. And I change the oil every 3000k with Mobile!.

 

Hi tkanaz,

Same questions—stock all the way around? —including tire size? It will be interesting to see how many others are getting less than 25 MPG.

Kerry

 

Ive never gotten anything below 26.9mpg, Ive owned the box for a little over 2300 miles now, The most Ive seen was 32.6, but I dont even know if I can count on the pumps around here because the milage varies so much...

Question about the scangauge:
Does it merely transform the computers information to words? Is the xb's onboard computer the thing that is calculating the mpg speed and all that, and how acurate is the scangauge?

 

Ok, here's the info on my tires:
Riken Raptor radial tubeless 215/35Z R18 84W
And I have no idea what any of those numbers mean.

 

Hi jasonsxb,

From my understanding of ootsae's post "...Meaning a 205/35-18 tire is too small giving you less mileage." that's your problem. It's a bit expensive to remedy unless you kept the OEMs.

Kerry

Aside from tire pressures (which I'll be checking and inflating if necessary tomorrow) the only thing I can hope for is to find a filthy clogged air filter that happened when the original owner drove through a debris storm. —pushing my luck on this what with the car only having 6200 miles.

 

I have 205 50 16's. That's the only difference. Everything else is stock. I have used ever gas station's gas. Same results.

 

i've been getting in and around 30-32 MPG's

 

Hi tkanaz,

Re: "I have 205 50 16's. That's the only difference." From your reply it appears you don't think the size differences account for your poor MPG. I know nothing about these things so this subject is of interest—eventually I'll have to replace mine, it would be nice to know the effects of diameter on MPG.

You've changed two size aspects from the OEM P185/60R15 size tire. Do the "60R" and "50" measurments refer to the width of the tire's footprint? If so, it would seem that your narrower tire would cause less resistance than my stock width of 60R

Here's some answers from Wikipedia https://www.scionlife.com/forums/vie...770951#2770951

Kerry

 

i havent really got a good measure yet but mine gets an average of 320-330 per tank before the light. I average about 35 mpg...but i've also squeezed 40 out of it on one tank....but it was literally all highway driving...lol

 

I got 33mpg. 364 miles to a tank. No engine mods,....yet.