Years back I drove my company work van on gas station bulk oil for 180k + miles. I sold it to my bil and he took it up to 260 k on the cheapest oil he could find. My point is motors are the most durable part of a car or truck, and you can pretty much count on other expensive parts to die before the motor gives up. If you change the oil and filter when it's due, you won't wear it out. If you read all the accounts of oil usage from everyone on this site, you'll notice the trend. Oils today are the best they have ever been. so I would keep using what you have been using. Spending more for oil will gain you nothing in longevity.,,,