Quote:
Originally Posted by PineywoodsPete
Although most of my HiHy driving is in the relatively flat lowlands, my best milage is always in the S. Colorado mountains - San Luis Valley region where my son lives. I always get above 30 mpg highway FE regardless of the terraine there, which I assume to be due to the decreased air resistance at this 8,000-12,000 ft altitude.
If I remember correctly, air density decreases about 3% for each 1000 ft of altitude - roughly 20-30% less air resistance at equivalent speeds at the above altitude range compared to sea level. I note that Sr. Kite hails from CO.
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This entire tank was driven in a relatively tight elevation range around 5,200 ft. Also, I barely got up to highway speeds on this tank. A very high percentage of my driving was below 40 miles per hour. I don't believe the air resistance plays a big role at these speeds.
If you look at my tanks in the database, you can see what I get under other driving conditions.