fiveliterbeater wrote:.....so since my car has 51k on the clock, at what mileage do you guys recommend replacing the spark plugs and with what brand? have any of you done a spark plug replacement yet?
60k miles is good, but people have been known to stretch it ...
Stick with the Nissan OEM as listed in the manual - there are hot and cold versions, but the standard one ought to be fine for most people! You can get them for less at
http://www.everythinginfiniti.com.
And, whatever you do, avoid Bosch plugs like the plague. For some reason, they and Nissan/Infiniti engines simply do NOT get along. There are lots of horror stories here and in the Q45 forum about this issue.
Z