Re: Premium fuel?
Hello Johnnie,
You are absolutely correct stating that there are two different octane rating systems, M (MON: Motor Octane Number) and N (RON: Research Octane Number). These two figures are taken into consideration when minimum octane requirements are determined by utilizing a [(MON+RON)/2] calculation.
In regards to our stance on ethanol blended fuels, DaimlerChrysler supports the use of reformulated gasoline. Properly blended 91 octane gasoline with ethanol content not exceeding 10% may be used in all Chrysler Crossfire Models as per detailed in page 164 of the owner’s manual. This will provide excellent performance and durability of engine and fuel system components, reduced emissions and improvements in air quality.
Such blends are required in various parts of the USA to reduce carbon monoxide emissions during the winter months. Operation of the vehicle with any gasoline with an octane rating lower the 91 is not recommended regardless of ethanol blend.
DaimlerChrysler has a vision of lessening environmental impact and our dependence on oil through improvements in conventional internal combustion technology (such as our MDS system), hybrid development and our long term commitment to develop fuel cell vehicles.
Dan S