Oviously Polaris is going to recommend their own brand of oil because thats how they make their money. But in my opinion, Polaris Blue is some of the worst 2-stroke oil out there. Right next to Arctic Cat's oil. If you are willing to spend the money, Klotz is some of the best stuff out there and Amsoil is also right up there too but you're going to have to pay quite a but more for both over Polaris blue. I think Yamalube 2W is also a decent oil for a decent price and I run it quite a but also. Just make sure that when you switch oils, you try to run your oil tank down under a 1/4 before adding your new oil. Both oils should mix but it isn't the best thing to be mixing oils all the time.