C16 would be a no-go... that's something you want to use with boost/high IAT's. Great octane, but needs a lot of cylinder pressure to make it work well. Q16 is oxygenated and will likely give an increased when tuned, but it is also something that would be better for higher cylinder pressures (boost). All that said, people report back that it works well across the board for just about any application. That probably has a lot to do with it being oxygenated more than anything else.
If you don't want to try MR12, MRX02 is pretty good stuff. Look at U4.4 too... the performance of that fuel is damn good, super close to the MRX stuff, but it costs a lot less. It has a touch more octane, but is still in that oxygenated/leaded category. It really depends on how much octane you need for your set-up.... and how much timing you're willing to throw at it. People get away with MR12 (87 MON) on 13.5:1 set-ups, so 103 MON of U4.4 may be a bit much for a 14:1 build... I think MRX is in the 100 MON range. Regardless, it's all in the tuning/timing/dynamic compression. you may not be able to run as much advance with something like MR12, but it's oxygen content and the way it burns can make up the difference, and then some if you're fortunate.
Smart thing to do would be to get a pail of each and tune it out on the dyno... see which one does it for you. :)
EDIT: MS109 is in that crew too, but I don't know much about that one. It lists as unleaded though, which is a bonus for O2 sensor life. :)
Attack life... it's going to kill you anyway.
Last edited by SpazOnaZX; 10-26-2018 at 01:23 PM.