Originally Posted by Fanis
If you are buying an auto only for the fuel economy (which is minimal or even non-existent), then you are buying it for the wrong reasons. There is no way you will recover the cost by the fuel economy....even if you do, it will take you many years!
Exactly... well put.
In reality either will give pretty similar mpg, if driven to the engine/gearbox characteristics.
Manual has to be the cheaper for running costs. Mpg is not always the best measure of running costs, unless you drive very high mileage.