Dear Duhtree,
I've got a very small car (3 cilinders), somtimes it's hard to find it after I've parked it, which runs about 65km (40miles) on 1 gallon of regular fuel. A taxi will be more expensive and I always bring my wife to her work....
People are always laughing at me; big guy coming out of a small car...except when I fill it up, (about RD$ 650 and it's full; another 2 weeks of driving) then I am the one laughing....
If you want to save fuel; make the sunday a day forbidden for vehicles running on oil-products....and there are about 2,500 other ways of saving without paralyzing half the country. (my opinion)