My car specifies a 5w20. Over 150K miles I've used 5w20, 0w30, 5w30, 0w20, 0w40, 5w40. And some straight 30 weight from my lawn mower collection (half quart top off once to get rid of it). Most of the oils were M1, PP, or QSUD for brands and whatever had a great deal in sale or clearance. The 0w used mostly during the winter months. The others summer. 0w will flow better at startup and have slightly different characteristics at temp. But I'd use either in my car, based mostly on price if it's a known brand.