I've replaced about all of the small things that are normally done on 30k checkups, etc. I've replaced my spark plugs, waterpump, timing belt, distributor cap, and thermostat pretty recently. From reading the posts regarding transmission fluid, I've also decided to replace that and the diff oil just for good measure. I want to address the fuel injectors, however. If I have new spark plugs I just assume put in new injectors too. However, If I can get the same results with an stp injector cleaner or redline product, that would be easier. So, the question is, "is it more efficient to put in new plugs, or to put in fuel injector cleaner?" If the cleaner is the way to go, what kind would you recommend? If replacement is the answer, how hard are they to replace (physically - I hate getting cut up on projects). Looking forward to your advice. Thanks in advance.