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Hatchbacks Toyota Yaris Toyota Yaris Real-World MPG
472 messages, Last post on Oct 23, 2009 at 11:40 AM
You are in the Toyota Yaris Forum. Your Host is pf_flyer
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Replying to: pcovers (Jul 07, 2008 3:52 am) My car is different than yours. I've been seeing consistent results measuring the 1/8th's. I still use the full tanks method, but in a Yaris, there's not much else to do than watch the fuel gauge, so I'm watching fuel economy via the 1.8th tank intervals as well. |
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Replying to: pcovers (Jul 06, 2008 12:56 pm) Manual transmission. Use of aircon as needed. No deliberate intent to not use, but it is not on all the time I drive. Yes, probably very little driving over 70. I am not necessarily opposed to driving over 70, but in the Yaris, it seems like 65-70 feels fast enough for comfort. What most people are unaware of, is the fact that when it comes to Toyota's or Honda's they have very efficient A/C compressors which take next to nothing to power. Therefore the use of A/C has very little effect on fuel economy. Far too many people are thinking about the old days with big power draining compressors. Today that is a myth. I use the A/C all day every day as its 110 degrees average this time of year, so A/C is a must. I know how to calculate fuel mileage exactly and I tested in the spring before the super hot weather and each tank varied a bit as is normal because the terrain and route is always changing for me. The mileage with AC off 80% freeway, was 39.12mpg. With the AC on it was 39.85mpg . So as you can see the differnce in this particular case of two full tanks used as test points I did not suffer any loss. Now test 2. Same ratio 80% freeway but my southern route which is different and involves a bit of climbing. AC off 38.8, AC on 37.9, so again, the difference is negligible.
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I've had my 08 hatchback for two weeks now. My first tank I got 28 MPG my second 34.8. I'm sure it will get better as the car "loosens up" also I plan to get a Scan Gage, everything I've read leads me to believe that will help with the MPGs if I use it correctly. I'd like to lower the car 1 " and put on some 215 X 40 X 17 wheels, the wheels are aproximately the same height as the stock wheels but much wider. I'm wondering how much it will effect my MPGs, Anyone out there made these changes and have the data?
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Replying to: lparkhill (Jul 10, 2008 12:30 pm) If you are looking for handling instead of just appearance, you might consider adding a TRD rear sway bar first, tracking down some ultra light wheels on Tire Rack (sub 14 pound) and do a more conservative upgrade to 195 Michelin Exalto A/S tires which, according to CR, handle great and have good rolling resistance. Costco has good pricing on them in 14" (and the 14" are actually a sweet spot in terms of size, I had 195x14/60 Kumho KH16s on my Yaris LB with the sway bar and it was a sweet handling, easy riding, quiet set-up). I actually stuck with the steelies that came with the car because in many cases, modern "after market" wheels are actually heavier than steel wheels, particularly when you start "upsizing." But Tire Rack has some "light" aluminum wheels (Kosei?) on their website if you are looking to upgrade appearance as well as performance and they list all the wheel and tire weights. If you use an ultra low profile, stiff sidewall tire (and the set up you propose falls into that category) the reduction in mileage should be about 10%. Going from low resistance, OEM tires to higher resistance, higher performing tires is usually a 3% drop, but not all high performance tires have a built-in penalty, and not all "all season" radials are low rolling resistance. Consumer Reports has begun reporting on the rolling resistance of the tires it tests, and this will be more common as concerns about fuel efficiency grow. There ought to be a cheaper, more functional, more fuel efficient way to "tart up" the Yaris without going to the set-up you describe. You might want to research whether the wheel/tire set up from the Scion xD would fit your Yaris LB, they are very similar vehicles, and maybe someone will sell their Scion xD 16" tires and wheels as a setup you could just swap onto your Yaris. You would need to go to a tire size/wheel size conversion calculator, here: http://www.carbibles.com/tyre_bible_pg2.html to compare the stock Yaris and Scion wheel/tire size combination (you can actually just compare the two tire sizes and see if the diameters are close enough). That webpage also talks in great deal about tire and wheel issues.
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Replying to: podred (Jul 10, 2008 12:16 pm) My Spring/Fall A/C use when temps are like 70-80 has a much reduced negative effect on fuel economy.
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Replying to: lparkhill (Jul 10, 2008 12:30 pm) So far I have filled up 6 times since I drove it off the lot and 5 of the 6 were 40+mpg and the one under was 38.8mpg. Do you have automatic and drive primarily in the city?
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Check out bicycle tires. Racer and road tires are very narrow and shaped so that only the center tread is on the road. They roll easier and require less energy from the rider. Cruiser and mountain bikes use wider tires for better stability.. But they require more energy from the rider. Kip
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Replying to: kipk (Jul 11, 2008 4:55 am) |
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Replying to: psulions (May 23, 2008 10:30 am) I sold my Lexus ES 330 loaded with GPS and my husband and I are thrilled to be getting a Yaris. ... So try getting your point across NICELY....and your opinon will be received with respect.
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Replying to: jetfirek (Jul 13, 2008 6:02 pm) Please keep in touch with your thoughts, ideas, and impressions of the Yaris.  When do you expect to get it ? Kip |
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