Buy gas from a busy station

Try to buy your gas from a gas station that is consistently busy and therefore has its underground tanks filled on a regular basis. Gas stations that are slow will have gas that has been sitting in underground tanks for longer periods of time, leading to gas contamination. This contamination can mean that the gas you are purchasing is less powerful than fresh gas and will decrease your fuel economy. Try to time your visits to busier gas stations at those busy times but make sure that you’re not in a rush to get anywhere.