First off is it ok to run 2stroke fuel in a four stroke engine? also how do you choose the percentage of nitro needed in different engines.
I've been running 10% in my 2 strokes, but my spad could use some more power so i might change it along with my other 2 strokes to 15%. will this give it more power. Lastly what exactly is nitro and how does it work?

Thanks, Dave Trimmer