What type of oil does a 1994 Nissan altima take?
The Owner's Manual specifies 10W-30. I use Quaker State Full
Synthetic but traditionally, one uses non-synthetic engine oil for
a 4-cylinder engine. As long as you use 10W-30, you really can't go
wrong. Try not to mix synthetic and non-synthetic oils. Check what
was used in the last oil change and use as close to that as you