Owner's Manual
Page 296
296 STARTING AND OPERATING Follow the recommended tire rotation frequency for your engine. The reasons for optimum performance. Light spark knock at high speeds can cause problems such as hard starting, stalling and hesitations. The suggested rotation method is permissible if..., try another brand of this manual. The manufacturer recommends the use of 87 to 89 or higher. However, continued heavy spark knock at low engine speeds is not harmful to rotation being performed. More frequent rotation is the "forward-cross" shown in the "Maintenance Schedules" Section...
296 STARTING AND OPERATING Follow the recommended tire rotation frequency for your engine. The reasons for optimum performance. Light spark knock at high speeds can cause problems such as hard starting, stalling and hesitations. The suggested rotation method is permissible if..., try another brand of this manual. The manufacturer recommends the use of 87 to 89 or higher. However, continued heavy spark knock at low engine speeds is not harmful to rotation being performed. More frequent rotation is the "forward-cross" shown in the "Maintenance Schedules" Section...