American drivers across the country have more access to biofuels than ever before. This increased availability is changing the composition of the fuels offered to drivers. With this in mind, the Renewable Fuels Foundation (RFF) has released its updated resource on gasoline quality for auto mechanics. “ Changes in Gasoline Manual IV ,” in its fourth update has become the most used resource on gasoline quality and its relationship to vehicle performance. The leading author of the manual is Robe