type of oil

Ready to change oil in my 2009 Sedona that I bought w/ 150,000 miles last year .... The cap on the van says to use 5W 20 in it ... but the manual says 5W 30 ... Any experiences that would make a difference ... I live in winter country (USA) where it does get to 0 (F) or below & up to 90 (F)...