Nissan Repair: 2000 maxima pings, o2 sensor, carbon buildup

Question
2000 Maxima,sometimes pings under load,do I need high oct. ? Just got the car 1 month ago already changed 1 O2 sensor. Has 65,000 miles

Answer
John,

I would use premium only as that is what I use in my 2000 Maxima and it works fine.  If you are using regular it will ping all the time, under load.  You could try the middle grade but I just use premium and have no problem since it was new.  If it still pings it could be carbon buildup on the pistons and that would take a additive in the fuel to get it to go away.