Inside Mazda

Mazda’s New Cylinder-Deactivation Offers Improved Fuel-Efficiency Without Sacrificing Driving Performance

New engine technology helps make SKYACTIV-G even better

Usually, “running on all cylinders” is considered a good thing but not all the time. Sometimes, that means burning fuel when you don’t need to, which is why Mazda’s engineers went back to the drawing board to introduce a new cylinder-deactivation technology for 2018 that can cut down on fuel-consumption in certain operating conditions. The new cylinder-deactivation system can be found in the latest SKYACTIV-G 2.5-liter engine that delivers 187 horsepower and 186 lb-ft of torque.

Available on the 2018 Mazda CX-5 and 2018 Mazda6, Mazda is the only automaker to offer cylinder-deactivation technology on a four-cylinder engine in North America.

The challenge with four-cylinder deactivation is that an engine running on two cylinders is more likely to cause vibration. Mazda’s breakthrough solution to compensate for this is to use a fulcrum inside the six-speed SKYACTIV-DRIVE automatic transmission, helping ensure seamless transition between two- and four-cylinder operation.

Watch the video below to see how Mazda’s cylinder-deactivation technology works, improving real-world fuel efficiency without sacrificing driving performance.

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