On Nov 20, 4:43*am, "HeyBub" wrote:
Fat-Dumb and Happy wrote:
HeyBub wrote:

*Speed costs money, *how fast do you want to go? Around 30% less gas
mileage at 85 mph
http://www.mpgforspeed.com/

Suppose your destination is 85 miles away and gas costs $3.00/gallon. At 25
miles/gallon, you get there in one hour at a cost of $10.20.

Now, at 55mph, the trip takes 1.5 hours and $12.75 worth of gas, a $2.55
difference.

So, at the expense of an additional half-hour, you save $2.55 or $5.10 per
hour.

If you're going to a job that pays more than about $5/hr, you're financially
ahead to drive 85.

Do you see you error? You are assuming that 'driving longer' uses
more gas.
Clue: the engine will turn over in high gear the same number of
times at 30 mph
as it does at 150mph over the same distance.

That is another common fallacy along with the "two cars crash head on
at 60, is
the same as crasing into a wall at 120".


Higer speed is what costs more because you need more fuel to force the
vehicle through the air and rolling ristance.

Harry K

Harry K