*dvddoc everytime i'm changing my oil i always think this video is this true??? Mobil 1 put 1 million kilometers on a Mercedes-Benz engine then broke it down to see how the fully synthetic motor oil did in leaving minimal deposits and minimal wear on the engine, demonstrating how Mobil 1 will allow an engine to operate in like new conditions through an extended test length. Mercedes Million Kilometer Test - YouTube
Mobil1 tests synthetics on a BMW e30 325i through a rough one million miles. Mobil drives the important point that synthetics oil and gas additives preserve the mechanicals. The other important factor to note is the engine chosen is of the most durable that BMW ever designed, LOL Mobil Million Mile BMW 325i - YouTube