There are three key reasons why the transition to synthetic oils is occurring. They are the proliferation of smaller displacement turbocharged engines, escalating CAFE fuel economy requirements, and government regulations to lower tailpipe emissions.
ExxonMobil has introduced a new lineup of Mobil Delvac 1 synthetic heavy-duty diesel engine oils, that includes three products that meet either API CK-4 or FA-4 specifications.
One specification is for later-model Eaton heavy-duty manual and automated transmissions, and another is for Eaton medium-duty Procision transmissions.
For years, some fleets have turned to synthetic engine oils for easier starts in cold-weather climates and to help them extend oil drain intervals
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