Do any fuel additives such as STP Fuel injector cleaner or Outlaw octane boost hurt rotarys?

Yes, do not use that **** in your car.

Only use a premix such as Protek R or Marvel Mystery oil.

https://www.nopistons.com/forums/pub...DIR#>/ohmy.png or some royal purple 2cyl synthetic ashless for premix.. EXPENSIVE

where can i get those pre-mixes and what are the best ones?

anywhere on the internet, but protekR you have to buy from Pettit



you can buy the royal purple and stuff at any good automotive shop.

royal purple can be bought at the nopistons.com store

how do they hurt the engine?

Yea i woudl like to know that too. I can see how STP fuel stuff might, but how does a octane boost hurt it? woudlent that just be like putting better fuel in it?

I hope they don't hurt the engine, because like a year ago I used some octane boost on my n/a..

I dont see how octane boost coudl hurt em.