ORIGINAL: iflyg450
I use a omega 15% in all my planes then add obout 3oz of castor to a new gallon. I think for $25 this engine sounds like a good buy. It should move my Yak9 pretty good.
That`s what I`m using as Omega is all I can get where I live, it only has 16% oil so it has to be spiked with 8 oz. of castor for 20% total for modern abc engines and 14 oz. for 25% total for older style steel piston plain bearing engines 3 oz. is not enough, I`d add at least 10 oz. You have a great little engine that has the same power as a Fox .35 and will run much better on a profile.
Good Luck
Dwayne