Originally Posted by wret
It would add some cost but if you could extend the filler neck with a 45° tube, you would get to fill the whole tank.
Absolutely. The filler will be high enough to fill the tank completely. The fill hole will be 1.5" extend high enough to top off.
The capcity difference with the conical addition to the end of the cylinder increases volume from 1/4 gallon to 1/3 gallon.