Run anything other then NGKs and it will probably RUN fine, but get a misfire code, though i have been fine with autolites for a 15K or so
I never had to remove the battery out of the way when I did my spark plug changes before but I agree that the airbox/intake and the windshield fluid reservior should be moved out of the way (I set it on the brake cylinder so I don't have to disconnect its hose). Make sure you have about three 3" extensions, a spark plug gapper, a standard metric socket set, and 1-2 hours.
I changed to the ngk copper plugs, and the cars idle is 5X's better,and it runs smoother. I didnt need to remove battery, my intake box was already gone, so it took like 25 minutes.
bikerboy switched me over to ngk copper. he explained why, something about durration and knock retarding. i was, as the time, too excited to get my car back to fully pay attention. sorry.
well, copper plugs in general perform better than iridium/platinum whatever else they are making $8 spark plugs out of these days. The only real advantage those other plugs have is usually theyre pretty well made since theyre so expensive and they last twice as long as the copper plugs do. Most high compression naturally aspirated engines I have seen have copper plugs in them.
How long do the copper last? Those are on my list to replace this weekend. I am running iridiums right now, car idles a little rough at 81K. I have typically been running 4-5 oil changes between plug changes (12K-15K).
I dunno, that sounds more like the cycle on plats. I've been in the habit of changing plugs every 2 oil changes or about 10k miles. Plats are supposed to last in excess of 50k miles, and iridium out to 80k+. Though coppers have more conductivity, and thus better performance for cars that need a solid spark, they have a tendency to foul up and wear out faster than their less conductive counterparts.
Yes, I'm sure my motor can make it till November on these. Probably go a step colder in copper at that point.
I replaced my plugs with NGK 6962s. It sure was not fun doing it though. The car runs good and its little shutter it had at idle is a lot better.
I just did my spark plugs today and it took me about 1 hour and 30 minutes from start to finish. The boxer engine barely has room for a 3" extension. I had to connect the socket to the spark plug, then squeeze in the 3" extension and then connect it with the wrench. It was a juggle; I'm so glad it's over with. :hsugh:
Heh, for some folks I'd actually recommend the platinum or iridium plugs just so they don't have to go through that hassle as often. I've done it on my previous two Imprezas so I've learned some tricks with my tools to get it done easier. Haven't had a chance to do it to the GT yet though, but I think it has iridium stockers in so I think I'll wait until I void the warranty completely before ripping those out.
LOL, I'm digging up an old thread.... replacing my GF's plugs this weekend, too cold to do anything outside... Her wrx is stock, should I go with NGK Copper or go with the stock platniums?
thanks....I love ripping into the car so I could careless if I replaced them once per year. When you say 'drivability', what do you mean?
Copper is more.... i dunno how you say it. But, well, its better, just doesn't last as long. Copper will run smoother and all that good stuff. More reliable over a shorter period of time. Plus you can't run nitrous with platinum plugs.
thanks guys...I called bumper to bumper...the new O'RLY auto parts...coppers are a whopping 1.75 each.....
