I can say from experience that in the car I have now, a 1993 BMW 525i, has benefited from Mobil 1. It has had Mobil 1 almost exclusively since new and has 192,000 miles. This car uses -0- oil between changes and does not leak a drop. Runs like new. Inside of the filler cap is as new looking as the 29,000 mile Cobra I had.
I towed for a friend a few years back. I drove a 1987 F350 wrecker with just over 500,000 miles that had used Mobil 1 since new. Yes folks, that is 1/2 million miles before the harmonic balancer came off and took out the crank. Ran great until that time. This was a vehicle that was ran HARD almost 24/7.
460 Carb motor btw.
I don't care about the arguements, I believe in Synthetics and I run 'em in everything I drive. Change at 3000 to 4500 miles depending on convenience :-) Hell, WalMart sells 5 qt Mobil 1 jugs for under $20.00. Cheap insurance in my book.
///Mike
1993 BMW 525i
formatting link
of all the old cars