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Tires - Page 4

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Posted by Chuck Olson on November 21, 2010, 5:03 pm
 



I decided to buy new tires for my '05 Prius, replacing the Integrities with
Bridgestone Ecopias because I found out that  they are used on the '10 model
year, and my impression was that the '10 Prius gets very good MPG.
Unfortunately, that impression was wrong. If the '10 gets over 50 MPG, it is
in spite of the Ecopia tires; not because of them. My MPG dropped from 50
MPG in the summer to 46 and from 48 in the winter to 44, the seasonal
difference being a function of the gasoline quality here in California. And
the summer gasoline season seems to be getting shorter and shorter.

One more thing - - I found a gas pump that often agrees with the MPG display
on my Prius. That pump is golden! All other pumps I've had the misfortune to
employ tend to produce an MPG 3 or 4 percent lower than my dash display. Why
must it be rare to get your money's worth out of a gas pump these days?


Posted by Neo on November 21, 2010, 6:42 pm
 
On Nov 21, 12:03pm, "Chuck Olson"

Any gasoline operated vehicle can get better FE/MPG by using
non-ethanol blended gas, however, but service stations that sell
100% gasoline is becoming increasingly rare. Usually these
non ethanol gas stations donot  exist in metro areas.  To find
a gas station in your region/state that sells *real* gasoline goto....

http://www.buyrealgas.com/
or
http://pure-gas.org/

I found that the mileage on my 2010 Prius III using the OEM
Yokohama Avid S33 improved when I increased  the tire pressure
from 35 psi to 44 psi for the front tires and from 33 psi to 42 psi
for the rear tires. My overall MPG increased from a top 58 mpg
to a top of 66 mpg.  The higher psi lowers the rolling resistance.
I have to monitor the tire pressure constantly because the
Yokohamas Avid S33 seems to loose one or two pounds of
air pressure every week ( the Avid S33 maximum designed/
rated  tire pressure is 44 psi ). The lower tire rolling resistance
makes it easier for the MG/ICE to drive the Prius but more
importantly the LRR improvements extends the Prius's
ability to *coast* downhill ( where it seems to have the
most significant effect on the FE). On the down side,
the weekly resetting of the tires at these higher pressure
appears to have caused my tire foot pump to fail
prematurely(9_9)


Walter Lee
2010 Toyota Prius III, Blue Ribbon/Dark Grey
Yokohama Avid S33 (front 44 psi, rear 42 psi)
Scangauge II (AVG, RPM, MPG, FWT), Garmin 265WT, OEM floor mats
Washington DC Metro Area

Hypermiler in Training. :-P
+6000 miles, computed overal fuel efficiency  =60 mpg.
Worst tank FE   = 54 mpg computed
Best   tank FE   = 66 mpg computed
Last    tank FE  = 58 mpg computed

Posted by Cathy F. on November 21, 2010, 9:23 pm
 
On Nov 21, 12:03 pm, "Chuck Olson"

Any gasoline operated vehicle can get better FE/MPG by using
non-ethanol blended gas, however, but service stations that sell
100% gasoline is becoming increasingly rare. Usually these
non ethanol gas stations donot  exist in metro areas.  To find
a gas station in your region/state that sells *real* gasoline goto....

http://www.buyrealgas.com/
or
http://pure-gas.org/

I found that the mileage on my 2010 Prius III using the OEM
Yokohama Avid S33 improved when I increased  the tire pressure
from 35 psi to 44 psi for the front tires and from 33 psi to 42 psi
for the rear tires. My overall MPG increased from a top 58 mpg
to a top of 66 mpg.  The higher psi lowers the rolling resistance.
I have to monitor the tire pressure constantly because the
Yokohamas Avid S33 seems to loose one or two pounds of
air pressure every week ( the Avid S33 maximum designed/
rated  tire pressure is 44 psi ). The lower tire rolling resistance
makes it easier for the MG/ICE to drive the Prius but more
importantly the LRR improvements extends the Prius's
ability to *coast* downhill ( where it seems to have the
most significant effect on the FE). On the down side,
the weekly resetting of the tires at these higher pressure
appears to have caused my tire foot pump to fail
prematurely(9_9)

Thanks for your inpout.  If I wind up buying dedicated snow tires & using
the Avid S33s during the summers, I'll keep this in mind. Although, I have
to say, I don't like the way they handle on dry roads, either - so am very
tempted to jettison them altogether, even if they're only a little over a
year old!

Cathy




Walter Lee
2010 Toyota Prius III, Blue Ribbon/Dark Grey
Yokohama Avid S33 (front 44 psi, rear 42 psi)
Scangauge II (AVG, RPM, MPG, FWT), Garmin 265WT, OEM floor mats
Washington DC Metro Area

Hypermiler in Training. :-P
+6000 miles, computed overal fuel efficiency  ` mpg.
Worst tank FE   = 54 mpg computed
Best   tank FE   = 66 mpg computed
Last    tank FE  = 58 mpg computed



Posted by Cathy F. on November 21, 2010, 9:20 pm
 

My Corollas used to come with Bridgestone Integrity tires, & I hated them as
much as I can't stand these Avid S33s!  Always wound up buying a new set of
tires to replace the Integrities - they simply felt unsafe.  They didn't
hold the road well in dry weather & were awful in snow.  I always thought
the Integrity tires were grossly misnamed. <g>

I've considered that my MPG may well go down by switching out the Avid S33s,
but at this point I don't care - I'd rather have good traction & lose a few
MPGs, than to spend another winter sliding around on the roads. I'm *still*
going to be getting great mileage compared with most other vehicles, anyway.
;-)

Thanks for answering -

Cathy




Posted by Al Falfa on November 21, 2010, 6:00 pm
 "Cathy F."  wrote in message

Am reviewing tires to buy for my car before winter sets in.  2010 Prius
bought in Oct. '09, went through last winter with original tires - Yokohama
Avid S33 - & although last winter was not all that snowy, driving with them
was -not- good.  Actually, have never liked the tires that came on my new
Toyotas (often Integrities, which were also lousy in snow).  After switching
to all-seasons (vs. studded snows which I used before before radials came on
the scene), always wound up buying new tires that were better suited for
snowy winters.  And dry roads/cornering, for that matter. Liked the Goodyear
Regatta & Regatta II the best.

Have whittled it down to 2 all-seasons and 2 dedicated snows.  All-seasons
in the running: Yokohama Avid Envigor and the Goodyear Assurance
TripleTreds.  Snows: Michelin X-Ice Xi2 and Dunlop SP WinterSport 3D.  All
have TireRack ratings in various categories ranging from 7.5 - 9.2.  I've
done a mini spreadsheet to compare them, & it's basically a wash.  Will need
to check local prices.

Anyone know if there's a way to retro look up the ratings for the
discontinued (several years ago) all-season Goodyear Regattas that I bought
for my '90 & '98 Corollas, by any chance?  Would give me an even better idea
re: choosing the new tires, since I was happy with the Regattas in all road
conditions, summer & winter.  Held dry roads well, & were good in snow.

I also looked up the ratings for the tires that came on the Prius: the
Yokohama Avid S33.  Holy crap - no wonder I dislike them so much!  Their
ratings range from 2.9 - 6.1, with only 3.1 - 3.3 for snowy conditions!
Arghh - *why* they're supplied on cars destined for snowy winter areas is
beyond me.

Cathy

Cathy,

During the winter I was unable to climb my driveway with the OEM tires so I
bought a set of Bridgestone Blizzak snow/ice tires and a set of rims.  They
completely solved the problem.  Since then, the dealer who sold them to me
(Tires Plus) has switch tires for me each spring and fall at no charge.
Next best thing to chains.

Al



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  • Tires
  • Cathy F.
  • 11-21-2010
|   ---> Re: Tires =?iso-2022-jp?q...11-20-2010
---> Re: Tires Michelle Steine...11-21-2010
| | ---> Re: Tires Michelle Steine...11-21-2010
| |     `--> Re: Tires Michelle Steine...11-21-2010
---> Re: Tires Chuck Olson11-21-2010
|   ---> Re: Tires =?iso-2022-jp?q...11-21-2010
|   |   ---> Re: Tires =?iso-2022-jp?q...11-22-2010
|   |       `--> Re: Tires =?iso-2022-jp?q...11-22-2010
---> Re: Tires Jeff Strickland11-21-2010
|   ---> Re: Tires Jeff Strickland11-21-2010
|       ---> Re: Tires Jeff Strickland11-21-2010
|         `--> Re: Tires FatterDumber& H...11-21-2010
---> Re: Tires GM homepc11-21-2010
| `--> Re: Tires =?iso-2022-jp?q...11-22-2010
  ---> Re: Tires Elmo P. Shagnas...11-22-2010
  |   ---> Re: Tires Elmo P. Shagnas...11-22-2010
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