Which oil to use. on 2005 Hyundai Sonata

I have 65,000 miles on my car. When is it ok to start using 10W30 oil? It seems to be the common one used by most cars after a time. Right or wrong? Thanks.

Asked by for the 2005 Hyundai Sonata
Your vehicle calls for 10w-30 when the temp is above 32 deg F, which in southern cal its always warm. 5w-30 is for colder climates so you can use 10w-30 now.
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