2. Avoid sitting in you car with the engine idling between classes
A
car's engine idling for one hour consumes about ¼ of a gallon of fuel and
produces over 1.5lbs of carbon dioxide. Idling your car’s engine is bad for
your car too, because an idle engine runs relatively cold and so it doesn’t burn
the fuel as effectively as it does when your car is moving. This can result in
residues that build up in your engine, clogging your spark plugs and
contaminating your car’s oil. This in turn reduces your car’s fuel efficiency
when you are driving. Moreover, idling can result in the production of water
condensation which can make your muffler rust more quickly than it would if you
only used your car to take you places. Bring your i-pod
to the library, or find another spot to study and you can make use of the
heating and cooling already being provided by the university and save yourself
some money as well as helping the environment.
http://www.solveyourproblem.com/save-money-on-gas/idling-car-gas-mileage.shtml