Comments on: The Ideal Vehicle Speed for Best Fuel Economy

By: Mr. P

Mr. P — Tue, 13 Dec 2011 02:02:50 +0000

Actually the transmission can’t ‘run out of gears.’ If there were any more the car’s engine would stall or refuse to run. Imagine you pedaling on a bicycle, and every 1mph faster you go you add another higher gear. You will soon learn that @ 20mph unless your pedaling increases (you get more horsepower as your RPM increases) or you shift down it will be very difficult to pedal. Same with the engine.
You have to rev more to go faster. I will not disagree with burning more fuel. You notice that at 20mph on a bike that pedaling faster will indeed spill out calories
Most cars do get best mpg @ 40-60, I have exp.

By: How I achieved 17 km/liter : Marcus Can Blog

How I achieved 17 km/liter : Marcus Can Blog — Sat, 01 Oct 2011 09:20:58 +0000

[...] With patience and common sense combined, I have stopped useless overtaking, hard braking and driving near speed limits. (I may have to try harder though if swearing while behind the wheel is considered part of [...]

By: Niel Loeb

Niel Loeb — Sat, 17 Apr 2010 16:19:30 +0000

Here are two easy ways to figure this out:
If you have a tachometer, find your best fuel efficiency by noting the speed at which the tachometer is showing the fewest RPMs. Note there will be a number of speeds at which you get this number. See the second way for the reason.
Way number two is if you don’t have a tachometer. Listen to your engine as you accelerate, immediately after each gear change, you will hear and feel the engine slow. It’s at that point the engine is turning the slowest and therefore using the least amount of fuel.