Hi, im planning to change my own oil tomorrow, and in my 97 altima manual it mentions 5/30 oil i have 6 quarts of 0/30 and 10/30 . The oil is mobil 1 fully synthetic and i have heard from multople sources that either the 0/30 or the 10/30 will be just fine since there are no extreme cold condition where i live. Let me know what you know about oil in altimas. Thanks, pr0