how frequently should we replace our spark plug? 30k? 60k? or 90k? The maintenace guide sugguest 100k mile

My car has 50k mile and it's a 2006

 

Plat plugs will easily go 100K miles. I went 70K miles with my last car without touching the plugs and it still ran smoothly without a misfire at all.

100K would be fine, but if you are **** you can change them out sooner.

 

do it before you hit 70k and the powertrain warranty is up. Many people are experiencing their valve covers leaking when they change their plugs. And most are doing it after 70k so they're out of warranty and end up having to pay to have the seals in the valve covers replaced. I've got 61k on my car and i plan on checking the rear banks in a couple months to see if they're leaking. If they are, i'll have the dealer replace it under warranty and throw the new NGK's in myself.
-GP-

 

cool, thanks for the info.

I only have 50k mile right now, i think i am okay.

 

truth

 

OE PLUGS R USUALLY GOOD FOR 60K...USUALLY THE NISSAN AND INFINITY DEALERS WILL START OUT AT THE 40 K SERVICE TO REPLACE THEM....BUT A GOOD SET OF IRRIDUM NGK PLUGS AND DO THEM YOUR SELF...SAVE MAJOR DOUGH AND GET TWICE AS GOOD A PLUG..THEY TAKE LESS ENERGY TO FIRE AND WILL PERFORM FLAWLESSLY IN N/A OR FORCED IND....