Testing different oils over 4 years and 1 MILLION miles

Josh from Valvoline conducted this test for almost 4 years at the Valvoline Test Facility in Kentucky, and we were lucky to get to come in just for the end to see the results. Obviously, you'd assume that synthetic oil is superior to conventional oil, but we weren't certain exactly what we'd see when we got the engines apart. The side-by-side was one of the coolest things we've seen.

Obviously, this video was sponsored by Valvoline, #ad , but we at Gears and Gasoline filmed and edited the whole production except the footage of the cars on the dyno and subsequent engine pulls, and we did not modify any of the footage to change the look of the results. This is how it happened.
#machine #engine