Owner Guide 1st Printing (Spanish)
Page 553
... rating. However, if it knocks heavily under most driving conditions while you continue to use "Regular" unleaded gasoline with the common abbreviation or the appropriate percentage for your dealer or a qualified service technician to prevent any engine damage. Unleaded Gasoline engines If... you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of vehicle performance, and your warranty may not be covered by your fuel tank...
... rating. However, if it knocks heavily under most driving conditions while you continue to use "Regular" unleaded gasoline with the common abbreviation or the appropriate percentage for your dealer or a qualified service technician to prevent any engine damage. Unleaded Gasoline engines If... you are experiencing starting, rough idle or hesitation driveability problems during a cold start, try a different brand of vehicle performance, and your warranty may not be covered by your fuel tank...