SAITO FA-91s Four Stroke

I bought this engine from a friend of mine and this is the first time its been run in 6 years. Its my first four stroke. Is the fuel im using alright? its 15% Wildcat fuel. It didnt say whether it was for 2 stroke or 4 stroke so I just used it. *UPDATE* I used 2 stroke fuel :( could this have ruined my engine?

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[sbtbsd]

2 stroke fuel contains more oil compared to 4 stroke fuel. the engine just runs richer. there is no way to damage your engine using 2 stroke fuel.

[UncivilizedMonkeys]

@sbtbsd thanks I was kind of scared for a while. Does everything on this engine seem ok? Its my first 4 stroke.

[timbo69z]

With 4 cycle engine you can use fuel with lower oil %.

[xjet]

2-stroke fuel won't hurt your engine, in fact many fuel companies just stick different dyes and different labels on the same blend to sell it to 4-stroke users or 2-stroke users. I thought I could hear just a hint of detonation though when you opened up the throttle so the top end might be a click too lean -- although the bottom end sounds like its still way-rich.