Yes; you're just the first one to believe. Regardless of what those little cartridges are filled with, there's not enough of anything in there to do anything beneficial for your car. Nitrous is sprayed continuously in order to modify your fuel mix. All those little guys would do is cause a momentary temperature spike in the combustion process, most likely hurting something vital. If you ever want to seriously consider something like spraying, do a search on here and read up or talk to a local shop or something. Don't let natural selection choose you for its chew-toy.