The MOVES2014 model estimates emissions inventories for different vehicle types operating on several fuels. Fuels in the model include gasoline, diesel, compressed natural gas (CNG), liquified petroleum gas, "ethanol (E-85)" and "electricity." The "Ethanol" category includes blends of ethanol and gasoline in which the ethanol fraction exceeds 70 vol.%. Clearly, fully electrified vehicles do not emit exhaust pollutants, and will not be further discussed in this report. Note that MOVES2014 applies LPG only for the NONROAD component of the model. It is visible in the fuelType table and in the GUI due to sharing of tables between the on-road and NONROAD components of the model. The different fuels are handled with widely varying levels of detail and sophistication, depending on factors such as the prevalence of use and availability of data. Given its historic and current importance in the market and in inventory modeling, the treatment for gasoline is the most extensive and detailed. At present, MOVES2014a is intended to estimate emissions from gasoline blends with ethanol up to 15 vol.%. The treatment for diesel and CNG is much simpler. This document discusses adjustments or other calculations designed to account for changes in fuel properties on emissions of THC, CO, NOx or PM. Similar calculations applied to emissions of air toxics are discussed in a separate report.