g operating in an environmental test cell by adding a heat load to the passenger compartment.Alternative fuels means any fuel other than gasoline and diesel fuels, such as methanol, ethanol, and gaseous fuels.866 Cycle means the test cycle that consists of the last 866 seconds (seconds 505 to 1372) of the EPA Urban Dynamometer Driving Schedule, described in ??86.115-00 and listed in appendix I, pa