10w-30 mobil one is what i use in my 300 fourtrax and i would recommend it for that ATV
10w30
10w-30
10w-30
10w-30
PR8EA
four stroke motorcycle oil .
About 2.5 quarts of oil
i use 20w50 because its thick and lubes real nice
Use 90w gear oil. you can buy it from Wal-Mart or any auto place!
2.3-2.6 quarts of oil, make sure you change it regularly (at least every mionth) with the filter, and appropriate for weather
It should use 10w 40.... that's what i put in my trx300ex
2.83 US QT at drain and filter change.