Vehicle results include the following when E15 and E20 were compared with traditional gasoline:
- Tailpipe emissions were similar;
- Under normal operations, catalyst temperatures in the 13 cars were largely unchanged;
- When tested under full-throttle conditions, about half of the cars exhibited slightly increased catalyst temperatures with E15 and E20, compared to traditional gasoline; and,
- Based on informal observations during testing, drivability was unchanged.
It will be interesting to see where this research leads - bringing more ethanol into the fuel supply would decrease overall mileage, but it would decrease dependence on foreign oil as well.