Secrets of the fuel tank

Re: Secrets of the fule tank

You'll probably receive a technical reply shortly. I fill the tank until the nozzle stops and then continue slowly until rounding up to the next dollar. Works all the time and it's good for 450+ miles.

 

A little more technical, but not a lot
The bladder is kind of like a balloon in a can. It expands when you fill it and contracts as you use gas. The purpose is so that gas vapors don't form in the empty space as the gas is used, thus reducing possible emissions. I presume it lessens the chance of an explosion as well since it is the gasoline vapors that explode. Liquid gas just burns

I think the current wisdom on filling is not to go full bore, but one click back on those pumps that have latches so you don't have to hold it. When it clicks off, add the rest somewhat slowly so the bladder isn't forced beyond its 'full' size. Doing so can result in 'spit back' when you pull the nozzle out of the filler tube.

I use this method combined with calculating the expected minimum I can put in based on the computer MPG and mileage driven. If it was TRULY full the last time, I shouldn't be able to put any more in than that. I'm not sure it has been TRULY full as I have squeaked up to the nearest $0.25 or whatever without problems.