When I got the truck it had 10w30, I was using 15w30, I just put in 20w50 and it runs cooler and smoother. Has anyone run 20w50 in the winter. I assume cold start would be more difficult. Is there anything wrong with doing this?
You can leave it in if you want but I would not. I don't think it gets super cold in NC but your starting will be harder. Also your oil pump has to work much harder to push 20/50 through the system. That goes for all year. I forgot to take it out of my Camaro once as a kid in Wisconsin. Could almost count each cyclinder fire one cold Dec. morning. Now I run 10/40 summer 5/30 winter. Almost all new cars recommend 5/30 year round.