Highlights Policy changes will require rulemaking process White House aims for adoption by next summer Ethanol RINs have plunged 83% since start of year Houston — US President Donald Trump said Tuesday before heading to Iowa to announce an end to the summertime ban on higher ethanol blends that he wants lower US fuel prices. Receive daily email alerts, subscriber notes & personalize your experience. Register Now But the policy change to allow year-round use of gasoline blended with 15% ethanol, or E15, will not have an immediate impact on fuel prices or trade flows as it will have to go through a long rulemaking process by the Environmental Protection Agency. And oil refiners have already promised to challenge it in court. “We’re heading out to Iowa where we have a big statement to make on ethanol for our farmers,” Trump said Tuesday outside the White House. “We want […]