Unless you live in the artic, I wouldn't use 5-20w oil period. I've run all 3 of my Hyundai's on 10-30 for the summer and 5-30 for the winter. Never had a problem. BTW, looking at a Accent for my son who passed his drivers test yesterday.
Subject: 2006 Sonata Oil
Date: Saturday, December 03, 2005 7:51 AM
I had my first oil change yesterday at the dealer. It's an '06 Sonata GLS
V6. My owners manual clearly states that I should be using 5w-20 oil for
this engine, but my receipt shows they put in 10w-30. Should I be worried
I would think that especially for the Winter season, the thinner oil (5w-
20) would be better.