"Edge" I meant purely in terms of fuel efficiency. If you consider the average consumer looking at buying a passenger car they might be willing to spend a premi

"Edge" I meant purely in terms of fuel efficiency. If you consider the average consumer looking at buying a passenger car they might be willing to spend a premium on a more efficient car. Two common choices are a modern diesel or gas hybrid. At least here in the US the hybrid is a slightly more attractive choice if you factor in the purchase price and the price of diesel.