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Theoretically yes. The reason is that with less space in the top of the tank, there is less room for evaporation of the fuel in the tank, so you have less fuel turning to vapor in the tank. At least that is the theory.

No, the amount of fuel in the tank has almost no effect on fuel mileage. If anything the more fuel you are carrying around the more weight you are carrying around which will actually lower fuel mileage. Gasoline weighs about 8 pounds per gallon. But that little bit of extra weight is really meaningless. As to evaporation it is not a factor as the fuel system is sealed and any evaporation is miniscule. It is beneficial to fill your tank once it gets to 1/4 full. There are two reasons for this. Air contains moisture the more air in the fuel tank the more moisture in the fuel tank. Secondly the fuel pump uses the fuel to help cool itself. The less fuel the more chance the fuel pump will overheat which will shorten it's life.

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Q: Do you get better gas mileage if you fill up the tank?
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Do you get better gas mileage when you fill up your tank?

no if anything it is worse because of the added weight


How do you figure miles per gallon?

Start with a full tank of gas. Note the mileage on the odometer. When it's time to fill up, note the ending mileage and the number of gallons it takes to refill the gas tank. Subtract the ending mileage from the beginning mileage to determine how many miles you went on that tank of gas. Divide that number of miles by the number of gallons it took to fill the tank.Example:Starting mileage: 12,000Ending mileage: 12,360Total miles driven on tank: 360Gallons of gas to refill tank: 14So, 360/14 = 25.7 miles per gallon


How big would a gas tank have to be for better gas mileage?

The size of the gas tank generally has relatively little impact on gas mileage in most vehicles. To the extent that it does, the smaller the better (a larger tank weighs more and therefore requires more energy to move).


How can i find out my auto gas mileage?

Just write down the mileage when you fill up your car and drive until you need gas again. Note the mileage at that fill-up, subtract from the previous mileage and divide by the gallons of gas to fill up.


What is the formula to figure the gas mileage of your car?

Fill the tank and set trip meter to zero. The next time you fill your tank divide the number on the trip meter by the fuel purchased = fuel consumption.


How can you figure out how many mpg for 92 Lexus sc300?

Fill up your tank with gas and mark down your mileage, drive until you need gas again and fill up. Mark down your mileage along with how many gallons you put in. Subtract the latest mileage from the first mileage you wrote down and then divide the gallons put in.


How do you figure out miles per gallon?

Fill your gas tank to the top and write down your mileage (save it). Drive you car until you have about 1/4 of a tank of gas left. At the pump write down your mileage and fill your tank up to the top again. Subtract your start mileage from your finish mileage. Take the number of miles you drove and divide it by how many gallons of gas it took to refill your tank to the top. This will tell you how many miles you get to a gallon of gas. Example: Beginning mileage; 90,000 miles - Finish mileage; 95,200 miles Gallons used; 20 gallons 95,200 -90,000 ------------- 200 miles 200 miles divided by 20 gallons = 10 miles to the gallon


What is the gas mileage for a 88 Full Size Ford Bronco?

depends on the motor trans and tires, fill up the gas tank all the way, write down your mileage and drive normal till your next fill up, then divide the number of miles you drove by the number of gallons it takes to fill back up on your second fill up. this gives you your miles per gallon, for that tank of gas, to get a true number do this a few times and average out you findings


You feel mileage has been altered how do you check?

Fill your car's tank all the way full. Drive an exact number of miles. Fill your car's tank again and note how much gas was required to refill it. Divide the number of miles you drove by the number of gallons of gas. For example, if you filled your tank and drove 15 miles and then refilled your tank by adding .5 gallons of gas, you mileage would be 15 divided by .5 = 30 miles/gallon.


How many miles to gallon of gas for Ford?

Depends on what kind of Ford. Regular cars tend to have a better MPG than trucks.To find your MPG write down the mileage on your car at the time of your fill up. When you fill up with gas the next time write that mileage down. Subtract the two numbers and then divide it by the number of gallons you put in the tank. That will give you your MPG.


How much does it cost to fill a gas tank in a van?

The cost to fill a gas tank in a van will depend on the rice of gas. The higher the price of gas, the more it will cost to fill the gas tank. You will need to know how many gallons it takes to fill the tank and the price per gallon of fuel. You do the math.


How many miles per gallon a gmc w 5500 5.2 l get?

That depends on how it's ben taken care of, a way to find out is to trip the odometer when you fill the gas tank (do not top the tank off), next time you put gas in the tank, fill it up (do not top the tank off) divide the mileage by the gas used, do this at least 3 times to get your average mpg.