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post #31 of 44 (permalink) Old 04-05-2006, 02:45 PM
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Default Re: Larger circumfrance tires

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Originally Posted by etyler
When replacing the tires if available a 185/75-15 should increase the MPG.

Just simple logic; please explain why it won't work if I am missing something.
What kind of logic are you talking about?

My bet is using a Low-Rolling-Resistance Tires to improve mileage.

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post #32 of 44 (permalink) Old 04-05-2006, 04:33 PM
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The logic of a larger circumfrance tire, which yes, changes the final overall drive ratio. I have hear of peolpe butting on sporty low profile tires that reduce the circumfrace and their MPG decreases. So why not go the other way in tire size to increase MPG.
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post #33 of 44 (permalink) Old 04-05-2006, 10:26 PM
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Quote:
Originally Posted by etyler
The logic of a larger circumfrance tire, which yes, changes the final overall drive ratio. I have hear of peolpe butting on sporty low profile tires that reduce the circumfrace and their MPG decreases. So why not go the other way in tire size to increase MPG.
If the larger circumfrance tires or the higher final overall drive ratio did increase the MPG, please let us know the good logic why Toyota did not do so.

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post #34 of 44 (permalink) Old 04-06-2006, 10:09 AM
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If the larger circumfrance tires or the higher final overall drive ratio did increase the MPG, please let us know the good logic why Toyota did not do so.
Toyota had to choose between acceleration and MPG. Once the Prius got above 50 MPG (US) that was good enough. Toyota could have choosen a final drive ratio that gave even more MPG but the car would start to become too slow. I am willing to be a bit slower to get a bit more MPG. I just want bragging rights over other Prius owners about personnal MPG.
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post #35 of 44 (permalink) Old 04-06-2006, 10:24 AM
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I don't know about the effect on the drive train, but if you get larger tires, that means fewer rotations per mile. I would assume that the odometer would then record a lower number of miles than you have actually traveled, and a lower speed than you are actually going.
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post #36 of 44 (permalink) Old 04-06-2006, 10:31 AM
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I would assume that the odometer would then record a lower number of miles than you have actually traveled, and a lower speed than you are actually going.
Correct. That is acceptable.
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post #37 of 44 (permalink) Old 04-06-2006, 12:02 PM
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And except for the "measured mile" no way of figuring your exact gas milage. (what the heck, you know it is at least forty)
If you post your finding after driving the measured mile, Dan can probably give you your MPG.



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post #38 of 44 (permalink) Old 04-06-2006, 08:51 PM
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Quote:
Originally Posted by etyler
I am willing to be a bit slower to get a bit more MPG. I just want bragging rights over other Prius owners about personnal MPG.
Maybe, that works among a few minority dirvers who are willing to sacrifice the performance, then maybe the MPG number becomes a few percent better.

My suggestion is to understand Prius how it works and to learn the driving technique how to improve MPG number. You'll be able to increase your MPG number 10 to 20 % easily.

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post #39 of 44 (permalink) Old 04-06-2006, 10:41 PM
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I agree with Ken1784 100%. Once I learned to accelerate slowly, P&G or CC where ever possible, decelerate slowly, and increased my tire pressure my mileage went up dramatically.

When I first purchased my 05 Prius in October I anticipated being very pleased to ave 50+ mpg over the life of the car. I am now at 53.4 mpg lifetime and have hit 59+ mpg twice in a row (2 fillups and 850 miles). I am at 64+ mpg on the mfd for this tank (250 miles) so I should hit 60+ mpg on this one.

I anticipate hitting the mixed driving EPA estimate of 55 mpg sometime this summer, and will be going for more. WHAT A GREAT CAR!!! Many thanks to all for the discussions, tips, and encouragement, even if I have not been noticeable from a posting standpoint.

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post #40 of 44 (permalink) Old 04-09-2006, 03:03 PM
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Default What is CC?

I know what slow accelerating and P&G (Pulse and Glide) are, but what is CC?
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