Just replaced plugs in my 01 CL-S. I should have used the PZFR6E-11 (which are a bit hotter for the type S model) but had to install PZFR5F-11 which are for the CL-P. Is there a noticeable difference in performance? Does anyone strongly reccomends to replace with the correct temperature plug?

 

Only iridium NGK. Thats the right way to go.

 

I used the Iridium IX but the temperature number is 5 (cooler) for the CLP - I had to install those - should have used the Iridium IX but temperature number 6 (correct for the type S, a bit hotter than the ones CL-P uses). I ask this because my car is definitely going to be running better (replaced a bunch of stuff that was needed) but still have the annoying doubt that with the correct plug it should be performing even better (that thought keeps bugging me). I have reviewed a few posts about the spark plugs but still not clear if there is a definite noticeable difference.

 

Other way around. Higher number the colder the plug.

 

Only for ngk plugs. All other plugs temps are reversed

 

NGK is the way to go IMO. Spark plugs is something i don't cheap out on.

 

I am not being cheap using the CL-P plugs, they were sent wrong and i can not exchange them... I have to buy new ones in order to replace. Should I forget about that and just leave the ZFR5FIX-11 that are installed new or should I spend my $ again and buy the ZFR6FIX-11. Does anyone know if there is a noticeable difference in performance?

 

A spark is a spark.....the 6FIX plugs are COLDER plugs which means they transfer more heat to the heads than the 5FIX plugs. So will your engine run too hot now? I doubt it, only if you are making 1/4 mile runs every weekend at the track then I would switch them out. With winter coming, I'd say don't worry about it.

 

Thanks Chuck! I know my issue was kind of stupid but it kept bugging me... my CL-S is running great, even feel milage improvement.

 

whys everyone saying NGK anyway ... i always ran densos IK22 im in florida