1991 Honda ST1100 total miles on bike 106,438, this year 10,866.
Used Honda GN4 10w40, 20w50, Rotella 5w40, Mobil 1 10w40 HM, 10w40 MC, 20w50 MC. Put in 3.8 quarts, 5,000 miles later, 3.7 comes out. Can't tell the difference, other than Rotella came out real thin.