Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - How does propane burn hotter with fewer BTU than gas?

Stan · 05-04-2012, 12:00 AM

Maybe it's because fuel in an ICE is metered by weight, not volume. Propane has about 22,000 btu/lb, whereas gasoline has about 17,5000 btu/lb. Or maybe it's because gasoline engines chill the incoming air charge through evaporative cooling, while propane is already vaporized before being mixed with the air.

05-04-2012, 12:00 AM	#2 (permalink)
Stan EcoModding Apprentice Join Date: Jan 2008 Location: SF Bay Area Posts: 150 Silver Bullet - '02 VW Golf TDi Thanks: 5 Thanked 16 Times in 11 Posts	Maybe it's because fuel in an ICE is metered by weight, not volume. Propane has about 22,000 btu/lb, whereas gasoline has about 17,5000 btu/lb. Or maybe it's because gasoline engines chill the incoming air charge through evaporative cooling, while propane is already vaporized before being mixed with the air. __________________ Best tank ever: 72.1 mpg in February 2005, Seattle to S.F. New personnal best 'all-city' tank June '08 ... 61.9 mpg! Thanks to 'pulse-n-glide' technique.