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Make the Most of Your MDS

Making the Most of Your Car's Multi-Displacement System

Just a few simple tips can help owners of Chrysler Group engines with Multi-Displacement System (MDS) — like the Chrysler 300C, Ram 1500 and Jeep Grand Cherokee — get the most fuel mileage possible from their 5.7L HEMI V8 engine. And at this point in the never-ending game of rising fuel prices, we'll take any advice we can get. Read on for a few simple suggestions.

MDS-equipped vehicle owners need not drive in a certain way to realize a fuel economy improvement with MDS, but these driving habits can help maximize their fuel savings:

  • Keeping speeds to 65 mph or below - MDS uses four cylinder mode most at these speeds.

  • Use cruise control - this helps maintain a steady speed, generally allowing the HEMI to run on four cylinders for longer.

  • Accelerate more gradually - the HEMI will provide V8 power whenever it is requested by the driver.

  • Use a steady throttle whenever possible - this maximizes four
    cylinder mode.

    The Chrysler Group MDS is standard equipment with the 5.7L HEMI on seven vehicles: the Chrysler 300C, Dodge Charger R/T, Durango, Magnum R/T, Ram 1500 and Jeep Grand Cherokee and Commander.

    With the addition of MDS to HEMI-equipped Dodge Durango and Ram, MDS-equipped vehicles through the end of the 2007 model year will save more than 60 million gallons of fuel each year.

    The Chrysler Group MDS seamlessly alternates between smooth, high-fuel- economy four-cylinder mode when less power is needed, and V-8 mode when more power from the 5.7L HEMI engine is in demand. This optimizes fuel economy when V-8 power is not required, without sacrificing vehicle performance or capability.

    Chrysler Group was the first to offer modern, large-volume vehicles in North America with cylinder deactivation - the HEMI-powered 2005 Chrysler 300C and Dodge Magnum R/T went on sale in the of spring 2004 with the Chrysler Group Multi-Displacement System, or MDS. Chrysler Group was also the first to offer cylinder deactivation in an SUV with the introduction of MDS in the 2005 HEMI-powered Jeep(R) Grand Cherokee. Chrysler Group is the first to offer MDS in a pickup truck - the 2006 Dodge Ram 1500.
    MDS is a fuel-saving technology that is here today — customers get the power and capability of the HEMI V-8 that they desire with the fuel economy of a less powerful engine.


    (Source: Chrysler Group)

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