Q16 and C44(?) are oxygenated fuels. You don't really want to run the Q with Nitrous. C16, C23, and the NOS are the nitrous-specific fuels VP makes. I know of quite a few guys that run the C16 in N/A, I was just saying it's not the ideal fuel to run. There are so many to pick from.... but I know just about every SS/AH, PS and upper echelon Comp guys run the 25.