Fuel Saving Tips
Don't top it off
You need extra room in your gas tank to allow the gasoline to expand. If you top off your tank, the extra gas may evaporate into your vehicle’s vapor collection system. That system may become fouled and will not work properly causing your vehicle to run poorly and have higher tailpipe emissions.
posted by sr20de on November 25, 2011
this tip works for 54% of voting Fuelly members.