The only data that will show you that , is a OUA. If you don't drive your truck on the HWY / interstate for long distances, You are most likely driving severe duty conditions. Severe duty/driving conditions include but are not limited to.. Cranking up your cold engine & driving a few blocks to the store and back home. (not getting engine up to operating temps). Stop and go in town traffic where the engine will be idling a lot at traffic lights. If anyone says you can go 10K miles B-4 changing your oil without a UOA. They are telling you a lie. They know nothing about your driving conditions.... Why not just drive 20K,30K 40K etc,.B-4 changing.. I guess these people just pull some #'s out of their hat and say to themselves ,, that's a good # to change my oil. A UOA is the only way to know !