I am going on 41k miles. It seems plugs were a maintenance item at 30-35k and i had them replaced and got back the old ones. they were fine. could have easily lasted another 30k. also good color (light brown) with the original heat range supplied.

 

bought on dec. 31,2004 now have 7000 miles and no problems

 

bought 2/10/05 and i have 4500

 

1 month old: 2200 miles

 

10 months; 12K

 

bought on march 25, 2005. some where between 19.6k and 19.7k






i bought it used with 18.2k miles on it.