This bill makes it easier for car manufacturers to meet federal emissions standards by giving them credit for producing flex fuel vehicles—cars that can run on E85 (a fuel blend that's 85% ethanol and 15% gasoline). Here's how it works: when the EPA calculates whether a manufacturer's fleet of vehicles meets carbon dioxide emission limits, they can now count flex fuel vehicles as producing 31% less carbon dioxide than regular gasoline-only vehicles. This credit is based on research showing that E85 fuel actually does reduce emissions by about 37% compared to pure gasoline.

The practical effect is that manufacturers get a significant boost in their emissions calculations just by including flex fuel vehicles in their lineup, even if customers rarely use the E85 fuel option. The bill requires the EPA to update its regulations within 120 days to allow this 31% credit. It also gives the EPA flexibility to increase this credit even further if newer research supports a bigger reduction. Supporters argue this encourages the production of flex fuel vehicles and supports the ethanol industry, while critics might worry it lets manufacturers meet emissions standards without actually reducing real-world pollution if drivers continue using regular gasoline.