What does it take to make 20k mile oil?
One of my fravorite You Tuber's, Jason Fenske, at Engineering Explained gives us an inside look at what kind of R&D it takes to make a 20k mile oil. Notice the 500k test miles they put on the Silverad...
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Outside of semis, there really isn't much point for 99% of people. The cost of an oil change once a year is insignificant in terms of cost and ensures someone is looking under the hood occasionally.
