I recently got a really good deal on case Mobile 1 synthetic 5W-30 but 5W-20 is specified by the manual. Am I going to run into problems using it in the winter? Or will the problem be relatively tiny? I change it every 5000 miles along with the filter.

I'm nearly certain it won't be a problem in the spring summer and fall. But I'm not sure about in cold weather. I live in Cleveland OH.

Thanks.

Completely Stock 2004 Honda Civic DX

 

shouldnt be too big of an issue