It has recently been revealed that hybrid cars may not save you any money. Studies indicate that, when you factor in the price of the car and maintenance, it might take you decades to see any significant return. Even if gasoline prices were to reach $5 a gallon.
There is another problem which this surveillance video from December 30 shows. You might go so long between fillings that you forget where the gas cap is.
NOTE: I am aware that this is probably not a hybrid car. This is satire.