Speaking just for the Altima in my signature, I've been using the FRAM Ultra's of late(2 OCI's)Good deal, what oil filter are you pairing it with?
I change the oil & filter in November(around Thanksgiving) for our winter OCI.
And then when I do my spring/summer OCI, I only drain the oil and fill with something else for the summertime(car sees fewer miles).
I have been staying with a synthetic oil for all the vehicles however, if an engine(owner's manual) allows for a conventional(Altima, Firebird---not CIVIC), then I may(sometimes) use that too.
In my Altima, the OM allows for 5W30 & 10W30. I am assuming that they mean conventional/blend/synthetic. But strangely, not 5W20 anything. It doesn't say not to use 5W20 but, doesn't mention it either.
0W20 is the highest recommended oil in my OM in which I try to use in the wintertime.