I just use regular 10 w 30 i check it when ever i think of it usuly once a month i change it once a year

 

oil could have leaked into crankcase, only holds 3.5 oz

 

I have a polaris scrambler 400, and mine is actually burning counter balance oil. i drained all the antifreeze and it still did it.. i draind the counter balance oil and it didnt smoke so bad out the exhaust.... does this mean i need new seals in the engine?