INCREASING lpg capacity ?

2oldman wrote:
Ok, I'll rephrase the question. What is the cost to refill a tank in the same area where the exchange is still $20?

That's actually a tricky question because some places refill cylinders by the gallon, and some places refill them for a flat fee regardless of how much is still in there, and some of the flat-fee places don't fill them all the way. So you can't always compare $19.99 to $19.99.

At Menard's (big midwest Home Depot-type chain), an exchange is $17.99, and it has the usual 15 pounds of propane found at exchange places (Blue Rhino). Most other exchanges are around $20.

Some Menard's locations refill cylinders (not exchange). For a 20-pound cylinder, it's a flat rate of $17.99; they fill only to 18.5 pounds, which is better than the 15 pounds at an exchange, but still not full.

At a CVS not far from this Menard's, the exchange is $24.99.

The closest place I could find where you can get a cylinder completely filled and pay only for what you get is a U-Haul, and that's $3.59/gallon.

For the OP: An onboard tank can be a PITA to get filled, but it can be cheaper because you'll never suffer from a flat-fee fill, but also, I've encountered places that, if you do the math, charge more per gallon for filling cylinders than onboard tanks. There's a propane place (the kind that people use for home delivery) that charges $2.95/gallon if you fill an onboard tank, but they have a flat fee for cylinders that works out to $4.78/gallon if the cylinder is dead empty.

The Menard's that does propane by the gallon does the same thing--if you fill an onboard thank there, it's $3.45/gallon. The cylinder refill works out to over $4/gallon.