2008 Arctic Cat ThunderCat ATV Service Manual, Page 5Get this manual
RECOMMENDED ENGINE TRANSMISSION OIL
FILLING GAS TANK
! CAUTION
Any oil used in place of the recommended oil could cause serious engine damageDo not use oils which contain graphite or molybdenum additivesThese oils can adversely affect clutch operationAlso, not recommended are racing, vegetable, non-detergent, and castor-based oils
! WARNING
Always fill the gas tank in well-ventilated areaNever add fuel to the ATV gas tank near any open flames or with the engine runningDO NOT SMOKE while filling the gas tank
The recommended oil to use is Arctic Cat ACX AllWeather synthetic engine oil, which has been specifically formulated for use in this Arctic Cat engineAlthough Arctic Cat ACX All-Weather synthetic engine oil is the only oil recommended for use in this engine, use of any API certified SM 5W-50 oil is acceptable
ATV0049B
Since gasoline expands as its temperature rises, the gas tank must be filled to its rated capacity onlyExpansion room must be maintained in the tank particularly if the tank is filled with cold gasoline and then moved to warm area