spark plugs..when to change?

[cmckelvy]

I am getting awful gas mileage right now. I don't know if it can relate to my spark plugs not being changed since I did my new timing belt at 75K (currently at 102K), but I just changed out my fuel filter, MAF, and my fuel pump. My question here is 2 part. How often do I need to be changing these plugs and which ones do I need to be using. My car is just running an apr stage 1 setup.

[golgo13]

change spark plugs everytime it rains LOL but seriously once a month would be good and its cheap so why not.

[Hamotee]

If you are using copper plugs I would think every 3-5k would be on the safe side. They most likely will last longer than that, but for 8 bucks a set it makes sense to change them just to be safe. Spark Plug info here

[Turb_Oh_A4]

yea bro, the NGK coppers people say are good for about 5000 miles, a few less miles than you stated :P it's super cheap, so why not?