CNG and LP fuel system modifications. MMT in gasoline

CNG and LP Fuel System Modifications

Modifications that allow the engine to run on Compressed Natural Gas (CNG) or Liquefied Petroleum Gas (LP) may cause damage to the engine, emissions, and fuel system components. Problems resulting from running on CNG or LP are not the responsibility of the manufacturer and may void or not be covered by the New Vehicle Limited Warranty.

MMT in gasoline

Methylcyclopentadienyl manganese tricarbonyl (MMT) is a manganese-based metallic additive that is blended into some gasoline to increase octane. Gasoline blended with MMT provides no performance advantage beyond gasoline of the same octane rating without MMT. Gasoline blended with MMT may reduce spark plug life and emissions control system performance in some vehicles. The manufacturer recommends that gasoline without MMT be used in your vehicle. MMT content may not be indicated on the fuel pump; therefore, ask your fuel supplier whether the gasoline contains MMT. MMT is prohibited in federal and California reformulated gasoline.