I use Mobil 1 in everything that I run. From the 70's push mower(FIL gave it to me in 1981), the Dixie Chopper rider, my 139K miles 2003 Harley Electra Glide, 2002 GMC Sonoma 150K, 2013 Buick Lacrosse, and of course the 73 Buick Apollo J/SA that had managed to win a few races with my brother at the wheel. My old 1992 Chevy half ton P/U that towed it back and forth across the country with it's 305 that had over 200K+ miles on it with nothing more than two alternator changes.
Check out the videos taken here at Mobil's (ExxonMobil now) research facility.
http://www.mobiloil.com/USA-English/...hetic_Oil.aspx
Then there was that BMW that we ran for over 1 million miles a few years back with 7,500 mile oil changes.
And of course I would recommend Delvac 1 for you diesel fans!