EVERYONE has a fuel they like to use. So, keeping brands out of it, DONT go lower than 20% nitro. It will run COOLER than the 16%, and the mill will respond to the 20% much better than 16%. You wont get any more life out of it using either or.
I have had the best luck with the Byron's gen2..It has been more consistent from gallon to gallon than any other fuel i have used. I would use 20% i can see no reason in running 16%..
I use the sidewinder 20% the oil content is higher so you dont have to after run your engine everytime your done racing, it says clearly on the bottle do not use after run . Just make sure your pistons at bdc and the gas is out of your tank and lines. i think you"ll like it.