RE: two types of capacities
I HAVE A GAS GAGE IN MY CAR THAT HAS A RED LINE THAT INDICATES EMPTY. WHEN THE NEEDLE REACHES THAT LINE I GET OUT AND PUSH A STICK INTO THE TANK AND I NOTICE THERE IS STILL GAS LEFT IN THE CAR. THIS BOTHERS ME NO END AS I DONT KNOW WHETHER I SHOULD DRAIN THE TANK SO THAT I KNOW THE REAL CAPACITY OR SHOULD I FILL UP WHEN THE GAGE SAYS EMPTY ?