CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 501–599) > PART 538—MANUFACTURING INCENTIVES FOR ALTERNATIVE FUEL VEHICLES > 538.8—Gallon Equivalents for Gaseous Fuels.

538.8—Gallon Equivalents for Gaseous Fuels.

The gallon equivalent of gaseous fuels, for purposes of calculations made under 49 U.S.C. 32905, are listed in Table I:
Table I—Gallon Equivalent Measurements for Gaseous Fuels per 100 Standard Cubic Feet
Fuel Gallon equivalent measurement
Compressed Natural Gas 0.823
Liquefied Natural Gas 0.823
Liquefied Petroleum Gas (Grade HD-5)* 0.726
Hydrogen 0.259
Hythane (Hy5) 0.741
* Per gallon unit of measure.