That depends on the shape and orientation of the tank.
The gas mileage for a 25 footer is 7 to 10 miles per gallon. 32 footer get around 6 to 8 miles per gallon. Their fuel tank capacity is between 35 and 75 gallons. I would say the 25 footer would be comfortable for 2 people and get better gas mileage.
My class "C" had a 20 gallon capacity (not enough)
That really depends on the needs of the residence. However, 200-gallon tanks are pretty common.
It depends what size tank you have. If you know how many gallons a full tank holds, then multiply that number by 0.84; the answer is how many gallons are in it now.
450 miles divided by 15 miles per gallon = 30 gallons used on the one way trip.At a cost of $3 per gallon that works out to 3 x 30 = $90 for a one way trip.Assuming you also want to come home again, the return trip will cost 2x90 = $180 in total.It will take you 2 x 30 gallons divided by 15 gallons in a tank = 4 full tanks for the return journey.
Most oil heat dealers will have a chart that does just what you want, converting inches of oil in the tank to gallons. I found links to two dealers that have put the chart online. Looking at the charts side by side they don't match exactly but are close enough for most of us. http://www.oilforless.com/tankchart.html http://www.ableenergy.com/se/capacity.asp
Propane, AMERIGAS, zip code 92252 - Joshua Tree CA as of Jan 2, 2009 180.1 gallons: $767.80 home delivery pencils out to $4.209 per gallon
anns car 15 per gallon toms car 12.5 per gallon winner ann
7 A+
7 A+
Gallons of what? The fuel capacity is set by the frame manufacturer, GM, Ford, John Deere, Spartan etc. The fresh water and waste tanks will vary depending on the floor plan.
One barrel (42 gallons) of crude oil, when refined, yields approximately 19.6 gallons of finished motor gasoline. The remainder of the barrel yields distillate fuel oil, residual fuel oil, jet fuel, and other products.