96 SP using Walmart 2 stroke oil bad?

[Hallway]

Was the oil that the guy gave me when he sold it.
Bought a SP last summer, took it out at least 5 times.
Let sit for 3 months, have ridden it twice this summer and it still runs good.
Should I worry or what should I do?

Would also like to see if I could get a little more out of it.
But wanna keep it reliable. possible?
Rode a stand-up for years, just too old for it now.

Thanks,
Joe

 

[Sportster-2001-951C-Stock]

You need to get the arteries pumped if the Wally oil is TCW-3 type, drained, siphoned, in-line oil strainer changed. Eventually there will most likely be a time you hit the throttle and the rings seize, TCW-3 is an ashless oil and thus has no suspended protective metal oxides in it. Bombardier Seadoo operators manual requires API-TC Low Ash, for high performance 2 stroke engines. If yours is an Rotax RAVE engine, the XPSII synthetic is required, else XPS mineral or syn blend are acceptable.