I own a 2005 Chevy Cavalier and a 2003 Nissan Altima.?

[Cpt Doug]

Is it OK to use fuel injector cleaner in these vehicles (both have around 75K). If so when should it be added and how? If not, what other suggestions are there?

[Surfer Jeff]

A ' Hoy Cpt Doug

i guess you want to use it because they sound rough? yeah it is ok to use it just make sure you follow the directions and put in the correct amount. when you buy it there will be instructions.

[Nathan G]

yeah its cool to use fuel injector cleaner.

you add them when you have an empty fuel tank and filling up. put it in before you fill up. specific directions are on the bottle. you should only use it when you car is acting up, dont just use it.