Can you use e85 gas in a 1971 Ford F-150?
No, you should absolutely not use E85 fuel in a 1971 Ford F-150. Cars from that era were not designed to handle the high ethanol content of E85. The fuel system components (fuel lines, seals, carburetors) are not compatible and will likely be damaged, leading to costly repairs or even engine failure. Use regular gasoline as specified in your owner's manual.