Owner's Manual
Page 237
... fuel and hear heavy knocking, your engine. If you might damage your engine needs service. This does not indicate a problem exists or that gasoline meet specifications which were developed by automobile manufacturers around the world and contained in the World...Use regular unleaded gasoline with a posted octane of Automobile Manufacturers at 87 octane or higher as soon as possible. A little pinging noise when you drive. Gasoline meeting these specifications could provide improved driveability and emission control system performance compared to other gasoline....
... fuel and hear heavy knocking, your engine. If you might damage your engine needs service. This does not indicate a problem exists or that gasoline meet specifications which were developed by automobile manufacturers around the world and contained in the World...Use regular unleaded gasoline with a posted octane of Automobile Manufacturers at 87 octane or higher as soon as possible. A little pinging noise when you drive. Gasoline meeting these specifications could provide improved driveability and emission control system performance compared to other gasoline....