Nissan Repair: engine oil weight, extreme temperature changes, happy new year

Question
What weight of engine oil is best for the 2010 altima 2.5s

Answer
Hi Bob -

Where do you live in US?
If you live in an area with extreme temperature changes, I would get perhaps 5/30. If the temperature is rather steady, 10/30.

I would recommend synthetic oil.

Hope this helps -
aloha and happy new year
calvin