john:

these two things mitigate against optimum milage:

high speed (70 - 75 mph, vs 55 mph)
greater tire flex due to relatively underinflated tires for given psig at
high altitude.

it would be interesting driving 55 mph and reporting to the list any
change in mpg.

i have heard "stories" of chevy police caprices with the LT1 engine doing
25 mpg at a steady 55 mph, but those have much more efficient, high
compression, engines, with a far more aerodynamic body.

dan

On Wed, 19 May 2004 21:07:05 -0600, Klun John <jklun@EARTHLINK.NET> wrote:

>Hey all!
>
>I gotta brag about this.  My 84 GL with 1.9l was rebuilt by Bob Birkholz
(Grand Mesa Imports here in Delta, CO) 3 1/2 years ago.  He rebuilt it
with German bearings and sodium filled valves.  I've got over 60k on the
engine now and I use this baby for my daily commute.  I drive 100 miles
R/T daily on a 4 lane.  My speed is 70-75 and my gas mileage is
consistently 24-25 mpg in the summer and 22-23 in the winter.  Last
Sunday, I had to take my wife to Glenwood Springs to get some stuff and
then commute to work Mon and Tues.  My gas mileage was 25.99 mpg when I
filled up Tues night.!  Even I couldn't believe it!  I thought my gas
gauge was off...
>
>John