how often should you replace the plugs?

 

thanx, for all the tips, i just finished the last one. your supposed to change the copper ones every 30k to 50k deppernding on how hard u drive! i still had my stock plugs and i just now changed them at 83k, it runs great now

 

My PW just hit 30,000 so I was going to change them last weekend. I took one out, and it looked brand new except for just some slight discoloring. The gap was still .045 with the electrode just slightly rounded. I put it back in, and will check them again in about 10,000 more miles. Since the plug looked great, the truck runs great,and it's a PITA to change the plugs, I figure no reason to do it before it's needed. Just my 2 cents.

 

claw... its all about how the truck was driven... it is very possible they are still fine but make sure you stay on top of it!!! me i just go by the book so i have nothing to worry about....

 

30K by the book.

Also change your differential lube every 15K (often over looked).