Can you really save gas by keeping your tank full?

Question

I've heard that the less gas you have, the harder your car has to work and gussles more gas. Is that true?

Answer 1

As some have said, fuel equals weight, and that weight makes you use a touch more fuel. I believe the rough formula is for every 100lbs of weight, you lose 2% fuel efficiency (would have to research to verify this number) Now, keeping the fuel tank full in winter is a very good idea as it will actually help keep condensation down, and help prevent water buildup from freezing your fuel lines. And last but not least, in the wintertime, keep your tank above half full. This just might save your life in the event of a slideoff or accident, leaving you stranded in the cold winter but perhaps still able to run the engine to keep warm. Good luck.

Answer 2

in less filled tank the balance is occupied by . large volume of air increases evoporation and hence lower milage.

Answer 3

No. The only thing you might save is money because it was full of gas at the old price when the price suddenly went up.

Answer 4

Keeping your tank full in cooler climates can cut down on  water condensation, and keep your gas dryer.   Too much H2O in the gas can cause the  gas line  to freeze.

Keeping the tank full can be a good thing to do, but doesn't save gas.

Answer 5

REPUBLICANS MUST BE TELLING THAT I CANT BELIVE ANYONE CANT SEE THROUGH IT. THE MORE GAS THATS IN YOUR CAR THE MORE WEIGHT THE MORE IT HAS TO WORK TO PULL THAT WEIGHT THE MORE YOU BURN. DOES YOUR CAR WORK HARDER BECAUSE YOUR FAT BUDDY JUST GOT OUT...

Answer 6

yes that is some what true it all depends on your vehicle but that is true on most vehicles

Answer 7

actually gas weighs about 10 lbs a gallon. weight  on your car burns more gas. BUT the emptier your car is on gas the faster it burns. the best amount of gas for top mileage is between 1/2 and 3/4 a tank

Answer 8

I would think it would be the opposite.

Gas has weight.  It takes horsepower to move this weight.  It takes gas to make the horsepower to move the added weight.

Answer 9

Not really.  You have two factors.  Evaporation and weight.  The additional weight counteracts the benefits of less evaporation.

Answer 10

I think so.  But it really depends on how many RPM's you give the car.  If its like over 4 then you burn alot of gas.

Answer 11

Yes, you can definitely save gas by keeping your tank full... If you keep your tank full by not driving the car!