text: First of all, if you were to limit your car use from seven days a week to maybe three, you would be saving a ton of money. The avarage person probably fills there gas tank all the way up once a week. Depending on mile per gallon your car ges it could be different, but if you were to only use your car three days out of the week you would only have to fill your tank up about every two weeks instead of every weeks. You would save so much money if you were to do that. Gas prices arnt cheap in todays world, its not like you can go get a gallon of gas for 50 cents anymore.