2007 Polaris Sportsman 800 EFI, CALL 503-769-8888 The EFI system compensates automatically for changes in altitude and temperature, ensuring the vehicle starts readily in all conditions from 25 degrees F to 120 degrees F and at altitudes up to 10,000 feet. Sportsman ATVs equipped with EFI also use standard 87-octane fuel and get better gas mileage than non-EFI engines.