15W-40s are a much better oil.I started with Mobil Delvac ESP 5w40 but doing UOAs it was shearing. To fix this I switched to 15w40. If it’s 0F or colder I drive the wife’s van. She’s a S@HM and is adamant that she’s not going anywhere if it’s that cold
I also don’t mind the price of the 15w40
Just w$0.02