Love my local discount tire! Think I'm on my 6th or 7th set of tires in the last four years (numerous vehicles) and it's the only tire shop I'll go too. Fast, nice, and they go along way to retain customers.
I wouldn't begin to offer suggestions aside from doing your own research and doing what you feel is best.
Personally, I running QSFS 5w30 in my 5.0. It's cheap and a full synthetic. I'm waiting to hit the miles for my first UOA. Going to start at 3k and see how it looks. I have 48qts of it and...
So, after taking the family to clean up the deer blind, and let the kiddo do a little squirrel hunting. Well, I managed to get my deer, albeit out of season. Had about a 100lb doe suicide into my truck last night. She hit the right front tire, thank God for the +1's, then bounced down the side...
I’m running the 5.0 and it rarely sees above 4k rpm and occasional 7-8k towing. However, a lot of stop and go traffic, so was debating the 5w40 myself. I just cannot justify Amsoil, I’d still change between 3-5k, so not worth it.
I'm a staunch believer that a truck is a truck. IMO ,anything over a 302A is an unnecessary luxury and a waste of money. To each their own, but I'll take a new XLT over a used Lariat with those miles.