[John Jamieson]

Energy Source BTU Content
Propane 91,547 per gallon
Natural Gas 1000 per cubic foot
Electricity 3,412 per Kilowatt Hour
#1 Fuel Oil 136,000 per gallon
#2 Fuel Oil 138,500 per gallon
#3 Fuel Oil 141,000 per gallon

[Down South P.E.]

Energy Source BTU Content Propane 91,547 per gallon #1 Fuel Oil 136,000 per gallon #2 Fuel Oil 138,500 per gallon #3 Fuel Oil 141,000 per gallon

Which burns cleaner and more efficiently?(propane - excluding natural gas from your list) - is really the main point I was making.

With respect to storage I was really addressing capacity compared to natural gas which is generally compressed to 3600 psig to get an appreciable amount relative to propane's 100 to 130 psig.

Nothing like the smell of that good diesel exhaust though right? If I remeber correctly No. 1 fuel oil is aka kerosene. I think No. 2 is for farm equipment and highway use.