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Let’s talk FA-4 engine oil benefits, management


Jason Morgan is the editor of Fleet Equipment. He has more than 14 years of B2B journalism experience covering the likes of trucking and construction equipment, real estate, movies and craft beer industries.

With a year of the new American Petroleum Institute CK-4 and FA-4 oil categories under the industry’s belt, it’s a good time to take stock of the FA-4 oil benefits. To date, API has licensed approximately 83 FA-4 oils, which ensure that the newest categories of diesel oil for use in on- and off-highway vehicles and equipment are available in the marketplace.

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FA-4 oils are meant for 2017 model year engines, and only if the engine manufacturer has approved that oil formulation for use. Once you check your spec, the primary benefit of moving to an FA-4 oil in 2017 engines is the fuel economy benefit.

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While efficiency gains depend on spec, it’s generally agreed that A CK-4 15W-40 to a FA-4 10W-30 shows about a 2% fuel economy gain in a typical highway application. But your mileage may vary.

If you do choose to stock two oils—an FA-4 for compliant engines and a CK-4 for other engines, make sure all storage containers and engines are clearly marked. However, fleet owners should know that an accidental mixing or putting an FA-4 oil in a non FA-4 compliant engine for short-term usage will typically not cause harm to the engine, according to oil suppliers.

While that can provide some peace of mind for honest mistakes during the FA-4 transition, having a lax attitude in which oils are going into which trucks is not recommended. Setting the expectation for your maintenance team up front is one of the most crucial steps in carrying two oil formulations.



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