I use Champion Truck plugs.Big ol hairy Nickel ally Center and ground electrodes for long life. The larger firing surface provides max. spark in high load engines. Also, the screw threads are plated with an antiseize coating.I use the long lifer plugs cause I have a problem with my #4 plug hole that wants to stick tries to pull the threads but so far ive been able to tap it and clean it, but i wanna go as long as possible between changes.I figure 3 years with the cCampions.69 1/2 Six Pack said:In a '90 3VZ-E, platinum? Regular? Brand?