Fleet operators demand better and better fuel efficiency and, beginning with model year 2017 heavy-duty trucks, federal regulators will as well. For the first time in 10 years, OEMs, oil marketers, and standards organizations are coming out with a new category for heavy-duty diesel engine lubricants designed to maximize fuel efficiency from the latest in powertrain technology. The catch is this new category actually will include two lubricant standards, and it will be up to the end ...

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