Got this courtesy of http://www.mobil1.com.sg/performance/miles.aspx

Imagine Driving Your Car For One Million Miles. It Would Take Forever! (according to the video 66 years of normal driving)
In 1990 Mobil conducted an extraordinary experiment with Mobil 1 – the Million Miles Test. At Mobil’s research center in the United States, a new BMW 325i, with a 2.5ltr in line 6 cylinder engine, was filled with Mobil 1, and then run continuously day and night for the next four years – stopping only for routine maintenance and servicing.

The BMW spent four years on the treadmill, 24 hours a day, mostly at 85 miles an hour but with varied speeds – down as low as 45 miles an hour to simulate everyday driving.

After the equivalent of a million miles of hard driving, the engine was stripped and examined. What they found was astonishing: there was no sign of any significant wear. Not only was the engine still in excellent working order, most parts were still within BMW’s tolerance for a new engine!

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