https://www.mystiklubes.com/index.jsp has specs on their oils. Its a JASO FD oil and that means it meets a pretty high standard for lubricity, detergency, and smoke. Bass Pro sells it. Mystic Ultra is listed for $33/gallon on their website but only $19.99 at Bass Pro...wonder if this is a pricing error?
I think any JASO FC or JASO FD oil will work with our sleds. Find one that works for you and is reasonably priced.
BTW, I found perfect use for the gallon of VES oil I have left. I just blended it 50/50 with castor oil and will use in my 2 stroke lawn and power equipment. Should be the perfect combination for my 2 stroke (non-snowmobile) engines.
Other thing: Most important thing is oil ratio. Doesn't matter if you burn VES or Walmart Supertech if you are running lean oil ratios no oil will work well. Turn up that oil adjuster so you are running at least 40:1.
Lastly, even with oil turned up, does no good if your vented cap is not working. Just found my vented cap was sticking. My sled burned 50% less oil than my wife's sled for same exact mileage over 3 days riding. I just ordered some aftermarket tank venting kits for both sleds to be safe.