The guys at my O'Reillys are the most knowledgeable. I do like a lot of AutoZone brand though, Duralast batteries, brakes and STP filters.. AutoZone seems to have best store prices. A lot of stuff is less expensive if you plan ahead on-line mainly Amazon, Rock's less expensive but Shipping...
Shell, Valvoline, Mobil, Castrol...Yep, it's easy to get.
I got all the Shell I needed at Home Depot. My OReilly's has Valvoline on the shelf.
Home Depot has a fairly good Automotive Maintenance Department and it's less expensive than the auto parts stores. My HD only carries Fram filters though.
Yep, AutoZone and O'Reillys Recommends 5w-30 Synthetic. I think the manual does too, but I forget.
This Truck sits a lot, sometimes 2 weeks. With 5w-30 it developed a small drip from what I'm guessin is the rear main seal. I changed to Conventional 10W-30 and the drip Completely stopped. Also...
2004 Silverado 4.3l Grocery Getter 45K miles.
Valvoline 10w-30 Conventional/Wix XP Oil filter, Good Catch Can.
Truck has ~1000 miles since February 2021 (7months).
Oil still *looks new.
I know the rule of thumb is change every 3 months or 3000 miles (whichever comes first) . But the oil still...