Should I use the injector cleaner stuff on my n/a FC...
 

would those cleaners mess wit my seals? and would it help if i premix? or would it not work cuz there is premix in the tank?

there are cleaners by chevron that are illigal in some countries which my mechanic swears by but he never uses them in his rotaries so save yourself the trouble, and what i have seen happend a couple of times with premix is injectors clogging up. if its carbon buildup your worried about just use a good quality oil, dont cheap out on gasoline, and maintnence the car often.

The only time I use injector cleaners is when I'm preparing my car for smog check. Run my tank down to about 1/8, couple bottle of injector cleaner. Injector cleaner burns clean is a good thing,

It certainly won't hurt. I've used Lucas cleaner in my GXL and it worked decent. Of course I had about an 1/8th of a tank and I used the bottle sized to treat 100 gallons LOL. Ran the piss out of it and filled her up. Seafoam would be a great one to use also. But if you really want the injectors to be cleaned like new, send them to Witch Hunter

+1 on sending em off. best 80 bucks spent.

save the money and do it the right way by sonic cleaning them, flow testing, ect. ie witchhunter, ect.

Off the shelf injector cleaning chemicals are pretty weak and highly diluted. In general, they are only good for cleaning off minor gum and varnish. The only way to properly clean injectors is to have them cleaned by an injection shop.