Clean Air Council - Happy #AirQualityAwarenessWeek! You may not be filling your tank very often, but when you do, don't top off your gas tank! Spillage from topping off your gas tank
Is there any harm topping off your gas tank, almost to overflow? It's nice to be able to go longer between fill-ups. - Quora
![Close-up of gas pump fuel hose in gas tank of a car during refueling, with text reading Do Not Top Off and portion of wheel visible, San Ramon, California, December 12, 2019 Close-up of gas pump fuel hose in gas tank of a car during refueling, with text reading Do Not Top Off and portion of wheel visible, San Ramon, California, December 12, 2019](https://c8.alamy.com/comp/2AMGKAJ/close-up-of-gas-pump-fuel-hose-in-gas-tank-of-a-car-during-refueling-with-text-reading-do-not-top-off-and-portion-of-wheel-visible-san-ramon-california-december-12-2019-2AMGKAJ.jpg)