2015 Kawasaki Vulcan 1700 Voyager ABS Owners Manual - Page 83

82 GENERAL INFORMATION Research Octane Number (RON) and the Motor Octane Number (MON) as shown in the table. Octane Rating Method Antiknock Index (RON + MON) 2 Minimum Rating 90 NOTICE If engine "knocking" or "pinging" occurs, use a different brand of gasoline of a higher octane rating. If this condition is allowed to continue it can lead to severe engine damage. Gasoline quality is important. Fuels of low quality or not meeting standard industry specifications may result in unsatisfactory performance. Operating problems that result from the use of poor quality or nonrecommended fuel may not be covered under your warranty. NOTICE Use minimum of 90 octane gasoline only to prevent severe engine damage.