Originally posted by: SampSon
Originally posted by: Vic
Poorly. The city buses in my area average 4 mpg, using mostly diesel.
Shens. Need some numbers to back that up.
Even fully loaded tractor trailers make 8mpg.
:roll:
<a target=_blank class=ftalternatingbarlinklarge href="http://www.trimet.org/inside/fleet/bus/index.htm"> TriMet's buses travel over 26 million miles per year. That's like traveling from the Earth to the moon over 100 times. They use:
- 5.9 million gallons of diesel fuel each year
- 217,696 quarts of oil
- 91,104 quarts of transmission fluid, and
- 22,412 quarts of coolant every year</a>
26/5.9 = 4.4
While
Tri-Met is one of the most successful regional mass transit services in America, and a valuable and necessary service IMO, the buses are usually only packed at rush hour. Off-peak, it's not uncommon to see empty or near-empty buses.
The question was efficiency, and efficiency MUST always include cost. Like a hybrid gas/electric powered car for example. Most get such good gas mileage because they are already super-economy cars to begin with. Imagine the straight gas powered car gets 40 mpg and the hybrid gets 50 mpg -- completely reasonable numbers comparing an Echo to a Prius or a Civic to an Insight. Sounds good on paper but then you realize the hybrid costs nearly twice as much, with an ROI in excess of a decade of ownership, and you realize it's not very efficient after all, now is it?