In hot weather is it better to have a full fuel tank to reduce evaporation?

Question

or say a quater or half tank thus reducing weight and excessive fuel use due to this.

Answer 1

Petrol only evaporates quickly when in contact with open air. It is properly sealed in the tank and weather wont really affect it

Answer 2

It absolutely does not matter whether you drive with a full tank or an almost empty tank. The mileage difference is most likely minute and uncalculatable. Fuel weighs less than ten pounds a gallon, more like maybe seven, so the difference between full and a quarter full on most cars is about maybe 50 pounds. That's way less than your fatass mother in law when you drag her to the Friday night bingo game. Hauling her around will cost you a lot more than carrying a full tank of gas. Even a couple of cases of Bud weigh more than the fuel. The fuel system is closed, so if your car is working right you are not supposed to have any fuel evaporating anyway. The EPA hates evaporated fuel, and has made a buttload of regulations preventing it.

Answer 3

If I was you, I'd keep that sucker above half tank all the time, just cause the weight of fuel isnt going to hurt your fuel mileage noticeably, and I've seen people driving around with a quarter tank or under of fuel, and they dont realize that on most newer cars, the fuel in the tank cools the fuel pump. Well when the fuel in the tank is low, your fuel pump is under increased strain and has the tendency to go out, thus costing big bucks at the shop to replace. Just keep her up there and run on down the road :)

Answer 4

What kind of "evaporation" are you trying to avoid? Your fuel system is a closed system- unless you drive an antique. It matters not whether it is full or a quarter tank from that perspective. What does matter is the fuel cap is the correct one for the vehicle and that it is properly installed by the operator- YOU! As for saving fuel, it is better to fill up than to drive around several times looking for a place to add fuel to a half tank unless you are driving in the desert, in which case a full tank and several bottles of water to drink is the only way to travel.

Answer 5

As long as you have a gas cap, that maintains a good seal, there won't be much evaporation of gasoline, in your fuel tank, know matter what the temperature is. As long as the fuel is in a closed, nearly air tight container, like your gas tank, there should be very little in the way of evaporation. It doesn't matter whether you have 2 gallons or 20, the evaporation of the fuel, is almost nonexistent.

Answer 6

fuels are likely ton evaporate even on hot or cold weather so there`s no truth about that getting a full tank on a hot weather to save some money

Answer 7

I would say, "No" to a full tank on a hot day- that is: a very hot day. As far as I know, 'heat' increases the volume of the petrol and therefore could spill out, wherever it is able.
That might be the least of the possible problems with full tanks of petrol on a very hot day.
T.H.

Answer 8

hmm not understanding but from what i gather is that it doesnt matter either way. Modern cars have a EVAP system which catches all evaporation from the gas tanks and stores it using carbon. then when the car is running the engine burns the evaporated gas SO all gas wieght is on the car regardless of evaporation.

Answer 9

Do a few biceps curls every time you pick up shopping bags.

Answer 10

no problem with fuel evaporatin as tanks are sealed. However in hot weather and in direct sunlight car batteries lose their charge, and go dead so u need to jumpstart.