should i be pre mixing my gas. im hearing alot about it and ive never done it is it neccary?. i always use shell gas and i get the best performince off that. would i get more with pre mixing. what does it do for the engine?

 

Premixing usually only done when the stock OMP system is inoperative. Whether it be from just not working anymore, or being disabled. Most people do say though, that premixing instead of letting the stock OMP system will burn cleaner, although, others say that premixing lowers octane levels.