where is life going
AO Silver Member
Join Date: Sep 2003
The non platinum plugs wont give as good performance and will raise emmisions, and this wil get much worse as the miles rise.
Any case, 50 every 12K is 250 per 60K, so they work out much more expensive than the Platinum.
Note that iridium plugs are the daddies, way better than platinum, but more expensive, and only one of the 2 TS types is available (either denso or NGK do them, cant remember which)