I'm switching to Mobil 1 4t when my rebuilt motor hits 100 miles. Motor was knocking when I bought it. I'm breaking it in with Honda GN4. I've run Mobil 1 in everything from my drag cars to my trucks to my Harley for many years, and never had an engine problem out of any of them.
2001 Honda Foreman Rubicon - "Frankenstein"
2006 Honda CBR1000RR
2012 Harley-Davidson Road Glide