Anyone have any issues with using non-OEM Denso iridium plugs on a 2005 IS300, such as Champion iridium spark plugs?

 

Personally I like to use OEM plugs because your car will probably run best on them IMO. My car had autolite plugs in it when I bought it, and they had just been changed before I bought it and it didn't run that good on them. When I did timing belt and etc 90K maint to my car I also changed the plugs with Denso iridium plugs and it ran much better. Are the champion plugs 100K mile plugs like the Denso ones?

 

Stick with oem. Denso sk16rp11 part#90919-01219

Take advantage with your club lexus discount and buy it through sewell lexus parts for cheap.

 

^^^^ agree