Fuel

Content Source: 2021 PRO-RMK / RMK KHAOS / SKS 155 Owner’s Manual (9931274 Rev 01) > Operation Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

Fuel

WARNING

Gasoline is highly flammable and explosive under certain conditions.

Always exercise extreme caution whenever handling gasoline.
Always refuel outdoors or in a well-ventilated area.
Always turn off the engine before refueling.
Do not overfill the tank. Do not fill the tank neck.
Do not smoke or allow open flames or sparks in or near the area where refueling is performed or where gasoline is stored.
If gasoline spills on your skin or clothing, immediately wash it off with soap and water and change clothing.
Never start the engine or let it run in an enclosed area. Engine exhaust fumes are poisonous and can cause loss of consciousness or death in a short time.

WARNING

The engine exhaust from this product contains chemicals known to cause cancer, birth defects or other reproductive harm. Operate this vehicle only outdoors or in well-ventilated areas.

Fuel Recommendation

NOTICE

Prolonged exposure to petroleum based products may damage paint. Always protect painted surfaces when handling fuel.

North American Fuel

For peak performance, POLARIS recommends the use of fresh quality, non-oxygenated 91 octane level fuel or above. Although 87 octane fuel is usable, some engine performance will be lost and fuel economy will decrease. NEVER use unleaded fuels with an ethanol rating of E15 or E85 as severe engine damage may occur.

IMPORTANT

NEVER use fuel containing more than 10 percent ethanol, including E85 or 88 E15 fuel, in your snowmobile.

REQUIREMENT	600/850 MODELS
Minimum Fuel	87 E10 (R+M)/2
Economy Fuel	N/A
Maximum Performance Fuel	91 E0 (R+M)/2
Instrument Cluster Fuel Selector Setting*	91+ E0 Fuel = 91 PREMIUM MODE ANY E10 OR UNSURE Fuel = 87 ETHANOL MODE
* = When the type of fuel in the tank is unknown, Polaris recommends setting the fuel selector feature to E10 – 87 ETHANOL mode.

International Fuel

For peak performance, POLARIS recommend the use of 95 octane E10 gasoline or higher octane. If lower octane is used, some engine performance will be lost and fuel economy will decrease. Do not use gasoline with higher ethanol rating than E10.

REQUIREMENT	600/850 MODELS
Minimum Fuel	95 RON E10
Economy Fuel	N/A
Maximum Performance Fuel	95 RON E0
Instrument Cluster Fuel Selector Setting*	91+ E0 Fuel = 91 PREMIUM MODE ANY E10 OR UNSURE Fuel = 87 ETHANOL MODE
* = When the type of fuel in the tank is unknown, Polaris recommends setting the fuel selector feature to E10 – 87 ETHANOL mode.

Fuel System Deicers

If you use non-ethanol fuel (sometimes labeled “non-oxygenated”), POLARIS recommends the regular use of isopropyl-based fuel system deicer. Add 1-2 ounces per gallon (8-16 ml per liter) of gasoline to prevent damage resulting from fuel system icing. Never use deicers or additives containing methanol. POLARIS recommends the use of Carbon Clean.

IMPORTANT

If you use fuel with up to 10% ethanol (sometimes labeled “oxygenated”) do not add deicers or additives that contain any form of alcohol. Adding deicer to oxygenated fuels could result in severe engine damage.