During my years I managed to drive more than 1 million kilometers on the roads. And I also recommend Mobil1 5w20 oil to everyone. Proven and practically universal for all types of machines! Less damage on the roads! http://giftbasketex.com/
Use the manufacturers oil that came with your truck. Valvoline also has a deal which guarantees 300,000 miles on a motor consistently using Valvoline. I know this applies to their oil change shops but do not know if you can go over the counter for your own Valvoline products.
I usually change my oil before 4000 miles has elapsed. But if you use the Valvoline at the recommended 7500 mile interval you would be buying less oil. I do not claim to know what Valvoline expects for service intervals for this warranty.
Either product is fine. I have used Valvoline in every car, truck, and boat since 1965 and never had to tear down one of my engines.
Mobil1 5w20
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