Spark Plug recommendations....

[Tunaman]

Need to change plugs in 17 Penstar. Just realized 83,000 miles on original plugs!! Can't complain. What brand does everyone recommend? Company truck that I plan to sell in couple of months but want to change plugs first. Thanks

 

[tidefan1967]

The recommended interval is 100K so if you're going to sell it I wouldn't bother. Anyway I'm sure the factory plugs are some kind of NGK Iridiums since that's what they use in most of the other 100K applications. It's a shame you have to pull the upper intake to do the job though I will admit.

 

[Daw14]

Factory replacement will be best.

 

[Tunaman]

Factory replacement will be best.

What is factory replacement?