I've had Two Nissan Maximas an 03 and now currently an 08. Bought both cars when new and kept the 03 17 years and the 08 now at 16 years. I kept cost for parts on labor over the years for both cars. All cost were for maintenance mostly by Nissan dealerships where I lived. No gas or oil expense is included. I never did any maintenance myself.

2003 Max 17 Years $13,409 Total $788 Per Year $66 Per Month
2008 Max 16 Years $ 9,548 Total $597 Per Year $ 50 Per Month (this included $2700 for bearing change)
The 03 used oil in the later years, the 08 never. 03 146,000 miles the 08 115,000