A single 40# tank, as far as I know is only about 8 gallons of propane. I am unclear about the relationship between the # and gal. numbers but AFAIK you divide the # rating by 4.3 (lb per gal. of LPG) to get the actual gallon capacity. Then, allow for expansion knock off 10-15% from that figure to get your average fill in gallons.


I am curious though as to this lease arraingement. I hear that you can find decent tanks off forklifts at industrial slavage yards for good prices. State inspections is another thing altogether. Currently I live in a county with no inspections and the State Patrol recently gave up inspecting vehicles brought in from out of state so I never had my rig looked at.