If you want to save $$ try Tractor Supply and WalMart. I am not a big fan of WalMart but they do have good prices on name brand oil. Don't go to the store looking for it. Search their website and have it shipped to the store for pickup.
every place is different.. ive bought them at NAPA.. but we have a NAPA thats loacted right in an area of town where lots of trucking companies are so they stock a lot of commercial parts.. nearby is an Advance auto parts that has started beefing up commercial stuff.. they can even look my bus up in their computers now.
-Christopher
ha! we had a carquest here like that.. and it was actually a chop shop store.. there were certain code words you used to get the chop-shop parts... they get Busted (no joke) when a cop unsuspectingly bought a computer for his personal car..(the word on the street is the employee was new and sold him the cheaper one without said code words... thats the word on the street......) and found it wierd the computer had a VIN already in it before he went to flash it.. so he went to his radio and radioed in the VIN and it was stolen... that started the pathway to its closure....
-Christopher
I have had nothing but good luck with my local NAPA store. Even Parts they can't find in their system the guy at the desk has called several places and been able to Source them. But they are all different and my local Advance Auto Parts has my bus in their system and can pull up quite a few odds and ends that I didn't even think to look for.
I've got a trucking company owner who gets me NAPA parts at wholesale prices. Plus, there's a Cat dealer, O'Reilly's, and Autozone here. I'm gonna tap him for those three new batteries I need.