Regular Shell Rotella T 15-40. I have been using this oil in my motorcycles, quads and just recently in the Big Red. 20+ years now with never a problem. While I have used synthetics at times for extended drain intervals, good ol' Rotella has never left me down. Also it has the JASO rating for use with a wet clutch. Great oil.
Yup. Great oil. My dad runs it in his Gold Wing. I run it in everything I have/had owned.
