The oil and gas industry’s leading trade association renewed its call on Tuesday for the Supreme Court to strike down Environmental Protection Agency (EPA) regulations allowing a high-ethanol fuel blend into the marketplace.

The action is the latest salvo in an ongoing legal battle between the Obama administration and the American Petroleum Institute (API), which first urged the high court in February to take up consideration of the EPA’s decision to approve E15 fuel for cars made in 2001 or after.

The agency and the biofuels industry say the blend — which contains 15 percent ethanol, rather than the standard 10 percent — is safe for those vehicles.