Owner's Manual
Page 342
... world have issued and endorsed consistent gasoline specifications (the World Wide Fuel Charter, WWFC) to define fuel properties necessary to as hard starting, stalling and hesitations. However, continued heavy spark knock at low engine speeds is designed to reduce vehicle emissions and improve air ...gasolines, and in some circumstances, may result in poorer performance. Light spark knock at high speeds can cause problems such as "Reformulated Gasoline". Reformulated gasolines contain oxygenates, and are specifically blended to meet the WWFC specifications if they are available....
... world have issued and endorsed consistent gasoline specifications (the World Wide Fuel Charter, WWFC) to define fuel properties necessary to as hard starting, stalling and hesitations. However, continued heavy spark knock at low engine speeds is designed to reduce vehicle emissions and improve air ...gasolines, and in some circumstances, may result in poorer performance. Light spark knock at high speeds can cause problems such as "Reformulated Gasoline". Reformulated gasolines contain oxygenates, and are specifically blended to meet the WWFC specifications if they are available....