MPG Reality Check

[mbulriss]

Bob says he is running 4.89 rear gears. Those are some real 'stump pulling' or
drag racing gears. It makes me wonder what rear gears are Dorn and Chuck
running that get 9-10MPG?

Mike Bulriss
1991 WB40 "Texas Minivan" - unknown rear gears
San Antonio, TX - finally sunny again!

--- In WanderlodgeForum@yahoogroups.com, "freewill2008" wrote:
>
> Finally, after 7 years, I filled the fuel tank to the top, drove 1015 miles,
and filled it again. The 167 gallons calculates to about 6 MPG.
>
> The method has plenty of potential for error. The odometer reads low and I
don't have a GPS. I used the Google mileage plus 5% to account for wrong turns,
finding RV sites, etc. The route was Brookings, OR to Q by way of Hwy 101 and
Malibu, CA.
>
> The tank is so big that I figure the fill could be off by as much as 10%. If
the fill-up were 10% low, the MPG would have been 6.7. If the fill-up were 10%
high, the MPG would have been about 5.5.
>
> Other details: 1984 FC31 with California 210HP turbo 3208. Road speed about
58 MPH. 4.89 gears. 11R22.5 Michelins at 105 and 95 PSI. Towing a Honda CRV.
Air filter has about 5000 miles. The air intake is the enlarged version
designed for the 250HP turbo engine. Never blows any black unless I make an
operator error.
>
> To achieve the 10 MPG sometimes suggested for the FC, my mileage estimate
would need to be off by almost 700 miles, or the fill-up would need to be off by
almost 70 gallons.
>
> I'd be interested any anyone else's MPG observations and the method used.
>
> Bob Griesel '84 FC31 WLII WA
>