On 12/15/04 11:27 AM, "Gnarlodious" <gnarlodious@EARTHLINK.NET> wrote:

> I said:
>
>>>>> I got you beat, at 39 MPG (highway) I get over 400
>>>>> miles between fillups. (1.6 diesel).
>
> Chris DeLong said:
>
>> One thing to note is the size of tire on the front. This is where the
>> speedometer gets its signal. The rear tire size is pretty irrelevant if you
>> are tracking mileage via the factory odometer.
>
> OK, I measured the odometer inexactitude and it's .95012, which puts me at
> 37 MPG. thanks for the headsup.
>
> Incidentally, these are front tires P185/75R14, what front tires should I be
> running for more accurate speedometer/odometer?
>
> -- gnarlie
>
>
The tire would be a 185r14 which is about an 82 profile rather than the 75.
It is about a 3 percent difference in rotation distance.  The 75 will turn
more than the 82.

jimt