Use the quart of reg oil the dealer gives you to break in the sled, this is for break in but also just in case your oil injector does not work, then use the brand of oil what your sled make is if Polaris then use Polaris VES full synthetic, I always get a kick out of this if you can't afford the oil then don't buy a sled. People spend $10,000 or more on a sled then want to run cheap gas and cheap oil are you stupid!
This is why I never buy used sleds.
I have had Ski-Doo sleds and Polaris sleds and always ran the brand of oil from the dealer never blew up a sled ran 5,000 miles on them never had them break down.
26 years of sledding.
Here is one for you, a guy in Mercer last year used blue marble oil very good oil ran out switched brands poured new oil in injector container gelled blew up motor.
You can not mix brands or have problems, drain out old oil from container then switch.