I had NGK's in there, they did not look too spent, but I went ahead and put in bosch platinum quad fours. There is a noticeable difference. Granted I am probably just back to where the engine should be it still felt good. That and I changed the spent cobra tires I had on there. Put on some cheap Kumho's that I bought on Tirerack.com and what a difference. Its like my Vig is brand new. However, I may try some fuel injector cleaner. I do like Acura suggests, I only put in 93 or better octane (that hurt this winter, with the gas prices), but I have not put in a fuel injector cleaner. I will probably get some soon and see if that does anything. Now however I seem to have a new problem. Has anybody had this before? My speedometer is going crazy. I will start driving the car, and the speedometer does not move until like 15 Mph. Then if I really step on the gas it reads way higher. I was going down the highway the other day, and I was in the middel lane. The speedometer said that I was doing 80, but I was getting passed with ease by other cars. Im not too worried about it. The rpms tach ok, no major issue there. I dont think the tranny is slipping (yes I have an automagic). I figured its probably what ever device reads the cam shaft or something, but I have no idea where to look for that thing to see if there is a loose connection or something. Any ideas? Thanks guys.