I burn the semi and nothing but. 13000 miles on my srx 700. Clean the power valves every year. Never an issue.
(new rings at 7k)
just run them close to empty 1/4 or less and add new oil. I really dont know how much it matters many times I have dumped what ever oil the gas station had or dumped sea and snow in guys sleds who forgot oil never seen a issueCan I just add to my jar when I use some up or will it mix with the semi Polaris oil in the blue jar or waste it by sucking it out. I have 3 sleds full or probally 40-50 dollars worth the oil in my sleds because they are full.
Thanks
Harry