New power gain discovery!!!

So long story short I'm a cheap person when it comes to this bike, I'm not going to spend $20 on a qt of 2 stroke oil for a $90 engine, so i buy walmart 1 gallon bottles for $13, well i ran out and had to go to my local auto parts store and picked up 2 small bottles of 2 stroke oil, the first bottle ran out and i opened the second one, after mixing the fuel i noticed it was 10w30 lawnmower oil, my bike sounds more like a dirt bike and has a higher top end and revs higher, also when i noticed it was 4 stroke oil i mixed some 2 stroke oil with it,



concerns?
explenations?

but why did i get a power gain its weird

that makes sense, i noticed the idle was a lot higher, and it sounded tinny, i wish i could fire it and take a video but unfortunately a pick up pulled in front of me and destroyed my forks and rim,