Could be that the larger tires (giving you a lower number gear ratio) are
helping you on the highway, but making your truck work more when it's
driving on those rural roads. Depending of course on how much stop and go
there is.
-Chris
----- Original Message -----
From: "Andy Levy" <andylevy@yahoo.com>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Tuesday, June 12, 2001 8:45 PM
Subject: DML: Mileage oddities
> Now that the summer weather is stable, I'm starting to see some major
> differences in my gas mileage compared to what it used to be. I never use
> winter for comparisons if I can avoid it (just way too many nasty
> variables).
>
> Background: I've got a '99 318 auto with 3.55s, a tonneau and 31" tires
>
> Seems like this year I'm pulling 13MPG consistently on my daily commute
> regardless of which route to work I take. One route is 50/50 highway and
> "rural" road, the last mile or 2 is downtown. The other is about 75%
> rural, 25 1885433429ghway, and the last mile downtown. Both are 13-15
miles one
> way. Last year I was consistently above 14MPG, at times close to 15MPG.
>
> New mods not included in last year's numbers - QuickD TB, 180 t-stat,
> electric fan, BFG tires. Even after accounting for the height difference
> on my tires (last year Goodyear, this year BFGs) I don't get the same
> mileage as before.
>
> Out on the highway, I pulled about 18MPG Sunday driving Albany to
Canastota
> with the speedometer on 65 (which is closer to 70, my speedo reads a hair
> low w/ the new tires). A little better than last year.
>
> I'm not getting my knickers in a twist over it, I never expected 50 MPG on
> an American V8-powered 4x4 built as stout as the Dak is. Just interested
> in what the experts on the list think. The increase in highway mileage is
> real nice; I wasn't expecting the gap between city & highway to expand
like
> this.
>
> --
> -andy
>
> http://home.twcny.rr.com/andylevy/ --- andylevy@yahoo.com
> -------------------------------------------------------------
> modesty, n.:
> Being comfortable that others will discover your greatness
> -------------------------------------------------------------
>
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