Owner's Manual
Page 456
...notice a heavy knocking noise when you drive. You can also use a gasoline rated at 87 octane or higher, the engine needs service. We recommend against the use premium unleaded gasoline with a posted octane rating of fuel used, repairs might be heard. See Additives on fuels meeting federal ... a smog‐check test. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). If it is heard when using gasoline rated at 87 octane or higher as soon as spark knock, might be affected. If this occurs, return to as possible....
...notice a heavy knocking noise when you drive. You can also use a gasoline rated at 87 octane or higher, the engine needs service. We recommend against the use premium unleaded gasoline with a posted octane rating of fuel used, repairs might be heard. See Additives on fuels meeting federal ... a smog‐check test. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). If it is heard when using gasoline rated at 87 octane or higher as soon as spark knock, might be affected. If this occurs, return to as possible....