Polaris RANGER 1000 2023 Owner's Manual page 83

OPERATION
FUEL RECOMMENDATIONS
Most Polaris Off-Road Vehicles require unleaded gasoline with a minimum
pump octane number of 87. Do not use fuel with an ethanol content greater than
10 percent. Octane in excess of 87 will not damage the engine but typically will
not result in performance gains.
Be aware that fuel is mixed differently depending on the season. Summer fuel
has a low Reid Vapor Pressure (RVP), which makes it less likely to evaporate in
warm weather riding. This prevents vapor lock issues. Winter fuel has a higher
RVP, which increases evaporation to ease starting in cold weather conditions. In
winter, it's important to drain your tank and fill it with fresh fuel from a high
volume gas station. This ensures your fuel is a winter blend. After filling the tank,
run the engine for 10 to 15 minutes. This will fill the fuel system with the fresh
winter-blended fuel.
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