UPDATED: March 30 at 12:10 p.m.
The answer is "false"!
Jeremy Dyer, who is the operations manager for County Market Express convenience stores, told us none of these tips are true.
We also found this same e-mail on snopes.com.
That website not only says the tips are false, it goes on to explain why they are untrue.
The price of gasoline in California already has hit $4 per gallon, and the Tri-State area is not too far behind.
Below are some gas-saving tips we received via e-mail. Do you think they really make a difference?
We are going to check them out on Wednesday and let you know if they are true or false.
Getting the most miles out of your tank of gas is important. One tip says you should make it a habit to buy gas first thing in the morning when the ground is cold. The colder the ground, the more dense the gasoline, meaning more gas in your tank.
Another tip says when you're filling up, you shouldn't squeeze the trigger of the nozzle to a fast mode. You should be pumping on low mode. That minimizes the vapors that are created and put into your gas tank, which take up space.
One of the other tips was to fill up when your gas tank is half full. The more gas you have in your tank, the less air occupying its empty space.
Another interesting tip: If there is a gasoline truck pumping into the storage tanks, do not fill up. That 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.
Check this story later or stay tuned to KHQA's News at 5:00, KHQA's Evening News at 6 p.m. and KHQA's Late News at 10 p.m. to see what we learned.
Remember, we want to know if you think these tips make a difference! Also, have you heard any other old-wives' tales we should check out for you? Feel free to comment below or take your opinion to our Facebook page here.