I don't know what you guys are paying for gasoline.... My line of work is in petroleum for about 31 years now, so here are some tricks to get more of your money's worth for every gallon:
Here at the Kinder Morgan Pipeline where I work in San Jose , CA we deliver about 4 million gallons in a 24-hour period thru the pipeline.. One day is diesel the next day is jet fuel, and gasoline, regular and premium grades. We have 34-storage tanks here with a total capacity of 16,800,000 gallons.
✅ Only buy or fill up your car or truck in the early morning when the ground temperature is still cold. Remember that all service stations have their storage tanks buried below ground. The colder the ground the more dense the gasoline, when it gets warmer gasoline expands, so buying in the afternoon or in the evening....your gallon is not exactly a gallon. In the petroleum business, the specific gravity and the temperature of the gasoline, diesel and jet fuel, ethanol and other petroleum products plays an important role.
A 1-degree rise in temperature is a big deal for this business. But the service stations do not have temperature compensation at the pumps.
✅ When you're filling up do not squeeze the trigger of the nozzle to a fast mode If you look you will see that the trigger has three (3) stages: low, middle, and high. You should be pumping on low mode, thereby minimizing the vapors that are created while you are pumping. All hoses at the pump have a vapor return. If you are pumping on the fast rate, some of the liquid that goes to your tank becomes vapor. Those vapors are being sucked up and back into the underground storage tank so you're getting less worth for your money.
✅ One of the most important tips is to fill up when your gas tank is HALF FULL. The reason for this is the more gas you have in your tank the less air occupying its empty space. Gasoline evaporates faster than you can imagine. Gasoline storage tanks have an internal floating roof. This roof serves as zero clearance between the gas and the atmosphere, so it minimizes the evaporation. Unlike service stations, here where I work, every truck that we load is temperature compensated so that every gallon is actually the exact amount.
✅ Another reminder, if there is a gasoline truck pumping into the storage tanks when you stop to buy gas, DO NOT fill up; most likely the gasoline is being stirred up as the gas is being delivered, and you might pick up some of the dirt that normally settles on the bottom.
this post is rubbish for the most part! 1)the gasoline storage tanks are deep underground... the temperature fluctuations throughout the day are insignificant! 2) yes pumping gasoline fast creates more vapors while filling your tank... but that may account for a drop or 2 of gasoline at most... again.. insignificant... when you pull the nozzle out and have a few drops on the lip, the side of your car or on the ground... that's more wasted than wat the vapors would generate.3) nowadays, most cars have tanks that prevent vapors from escaping to the atmosphere.... the more weight in your tank, the more gas it takes to accelerate the the car. each gallon weights 6.1 lbs.. if your tank is 20 gallons then at half tank...you're still lugging around 60 lbs of gas... it takes gasoline to accelerate that mass.... and conversely more braking to slow down the car... minimal... but still a little bit more. if you're filling up more often.. then you're repeating the process more often... most likely you'll stop in and grab a soda or whatever you wouldn't normally buy... thus spending many times more than the few vapors lost in the re-filling process.4) when fuel trucks are filling tanks, yes... it's possible that miniscule sediment is stirred up at the bottoms of the tanks ... for sure that will happen, HOWEVER... every pump pushes its fuel through filters that will catch anything floating in the tank. i have NEVER heard of anyone getting poorly filtered gasoline from a gas station..... if you hauled fuel in a 5 gallon can... then all bits are off...they have no filters on their spouts.
lets use our heads, folks....
Don't most cars use a bladder anyways and so there are no air vapors or empty space in the tank?