Check the spec on the oil. If it has a winter rating, it should be fine as far as the flow. Regular oil will foul the VES valves quicker, which means you will need to clean the guillotines more frequently. You should also determine if the marine oil is rated for injection or for pre-mix, there is a difference.
Personally, I would find someone to sell the outboard oil to and buy appropriate oil for your sled. You don't have to use Polaris, but Polaris Gold is good stuff and doesn't stink.