Bruce 
2006 Nissan Altima Sedan 2.5 S 4dr Sedan (2.5L 4cyl 4A)
Best car I have ever owned.
 I bought this car with 42,000 miles and now have 252,000. I have had no problems with the engine or transmission. I always used Mobil 1 synthetic and 5-30 weight because of the close tolerance machining of  Japanese engines. I have my transmission flushed every 50,000. It has power but I drive it very gentle now because of the high mileage. The only thing I don't like is that it seems to pull to the right all the time just a little. I think it is from the acceleration of the front wheel drive. I put new tires on and had a laser alignment and still had a slight pull. The tires have always wore out perfectly even. I do tire rotation every 5,000.I did have to replace the radiator, battery, starter,shocks and struts. Changing out the front light bulbs is a pain. The last time I had an engine light turn on is because I forgot to change out the spark plugs at 100,000 and actually went 120,000 miles on them.This car has been my most favorite car with the least maintenance I have ever owned.