Auto manufacturers approve the use of Unleaded 88. According to an RFA analysis, more than 95% of model year 2020 vehicles have been explicitly approved by the manufacturer for the use of Unleaded 88. General Motors recommends the use of Unleaded 88 beginning with its 2012 model year vehicles and Ford recommends Unleaded 88 for its 2013 and newer vehicles. Unleaded 88 is also approved for use by Volkswagen, Audi, Toyota, Land Rover, Porsche, Jaguar, Honda, Subaru, and certain models of Mercedes-Benz and Lexus.