Polaris 900 RMK - Manual (Page 64)

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OPERATION
Engine Break-In
Oil Injection System
Always fill the oil reservoir when refueling.
CAUTION
Serious engine damage can occur without the proper lubrication.
Check the oil tank level often during the first tank of fuel. If the oil
level doesn’t go down, contact your dealer immediately.
Variable Exhaust System
All snowmobile engines equipped with variable exhaust valves should
use VES II 2 Cycle Oil (see chart below).
Oil Recommendations
Engine lubrication comes from oil added to the fuel and oil injection
systems. We highly recommend the use of only Polaris products.
Polaris lubricants provide the best protection for your Polaris engine.
Never mix brands of oil. Serious chemical reactions can cause
injection system blockage, resulting in serious engine damage. Oils
may also be incompatible and the result could be sludge formation,
filter blockage, and reduced cold weather flow rates. All Polaris oils
are compatible with each other.
Engine
Style
Premium
2-Cycle
Premium Gold
2-Cycle
VES II
2-Cycle
Liquid Cooled
w/VES
Good Better Best