Actually, the engine likes to work hard. They're happier in a motorhome than a pickup. Major suppliers put out several grades of product. There are premium grades of oil, and there are lesser grades. There are differences because the manufacturers are aware that some folks buy based solely on cost.
Engine oil has certain specifications.
Filters are the same story. The premium brands do much better. This is also true with respect to air and fuel filters. Engines wear out primarily because of abrasives. There are other types of abrasives than dirt.