maxnix wrote:5K is a lot of miles on an oil change unless you are driving cross country.
I'll do 5K every 90 days, sometimes quicker. 1st 5K has come in 83 days. With the quality of today's oils, it's a more than adequate frequency, IMO. First change was at 2500, second is 5K, then every 5K thereafter, always with a new filter, of course. Scheduled service every 15K. All of them done at dealer, including 5K oil changes. Four previous Infinitis under the same schedule. Never any lube related failures or any difficulties with warranty issues. Longest ownership was 94 Q that I put 90k miles in 6 years. Engine ran flawlessly at the time I traded it. Never used a drop of oil between changes in its life. Same with all the others.
I change the oil in my diesel pickup every 3K. It sits more than the Infiniti, and oil change frequency is more criticial to the diesel.