Using that flawed logic you shouldn't be even considering propane or gasoline engines.
Diesels typically get 10% to 20% better fuel economy per gallon than their gasoline counter parts.
No ignore the "36% more energy" nonsense.
This was a comparison of BTUs per mile.
1 BTU of propane = 1 BTU of gasoline
When comparing BTUs per mile there is no deceptive energy per volume advantage. BTU per mile levels the playing field when comparing different fuels when trying to accomplish the same work.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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