An October 2 American Petroleum Institute poll conducted by Harris Interactive found that 56 percent of respondents said they are very concerned about the impacts of ethanol blends above 10 percent on car engines. 69 percent said they believe ramping up ethanol production would increase food costs. In response to the poll, the Renewable Fuels Association said 73 percent of respondents support the Renewable Fuel Standard, according to a recent Fuels America poll.