Researcher John Graham at the Pardee Rand Graduate School was slated to discuss the study Friday at a National Academy of Sciences round-table in Washington.
Compared to gasoline, he figures, a driver could spend as much as $1,600 more on fuel over a vehicle's life burning E85, a mix of 85 percent ethanol and 15 percent gasoline.
. The study undercuts E85 at a time Detroit automakers are lobbying Congress for ethanol-supportive legislation and fuel-economy credits for building E85-compatible vehicles.
General Motors and Ford, both pro-ethanol, are among companies that support the Rand school. "They aren't crazy about the results," Graham told USA Today.