Mdcastle wrote:I guess my Jeep Grand Cherokee is good for the city then since the cost of the gasoline (20 mpg on premium fuel) encourages me to combine errands and not go for a drive just for the heck of it?
As far as the car-sharing concept, is it going to be nothing but Smart-Cars? I thought the whole point of car sharing was so you could get just enough car for your needs at the moment, like a Smart Car to drive to the office, a minivan to take the kids to soccer practice, a SUV to haul the boat or wood chips on the weekend, a larger, more comfortable sedan to drive to Chicago for the weekend...
You're point isn't far off, even with the slight snark. Again, from an environmental perspective, a truck with 10 MPG (or your Jeep @ 20) driving 3-4 miles a day is better for the environment (and built environment costs/impacts) than a Prius at 50 MPG driving 40-50 miles per day.
Yes, car-sharing does not focus only on Smart Cars, they offer mostly smaller sedans with vans for the occasional need for larger groups/travel. But financially speaking they would do well to have a fleet of cars as small as possible - I would bet that 90++% of car sharers are driving solo or with one other person and making short, local trips. Few will need a truck to haul a boat for the weekend, and if they did own their own boat that needed hauling they would likely also have a vehicle to transport it already (most people I know in relatively dense urban areas don't own a boat). The space required to store small cars is less, especially if you can double up in parking spots. Smaller cars typically get better mileage, and ZIpCar doesn't charge users directly for gas - maximizing fleet MPG puts money in their pocket.