FA-4: Oil Worth Waiting For
The new API FA-4 oil-service category was developed specifically to work in concert with the new generation of more fuel-efficient heavy-duty diesels starting to come on the market. Photo: Shell Oil
">The new API FA-4 oil-service category was developed specifically to work in concert with the new generation of more fuel-efficient heavy-duty diesels starting to come on the market. Photo: Shell Oil
">It's too early in the game to officially say that the fuel efficiency promise of the newly rolled out API FA-4 oil-service category has been met. On the other hand, there is enough research already in the bag to state with a high degree of certainty that this spec formulation will give a noticeable boost to mpg — and do so without any effort or even decision-making on the part of many fleets.
FA-4 is one of two new API donuts that started appearing on heavy-duty engine oil packaging late last year; the other being CK-4. CK-4 oil is the one the vast majority of fleets are now using (or will be using once their stocks of CJ-4 oil are used up.) CK-4 oil is backward-compatible for applications that originally required the use of CJ-4 oil.
Both CK-4 and FA-4 oils are formulated to improve resistance to aeration and to increase shear stability to ensure engines are protected from wear and tear. FA-4 is distinguished because the category was developed specifically for formulating oils to work in concert with the new generation of heavy-duty diesel engines — starting to come on the market this year — to improve fuel mileage.
An example of third-party research attesting to the fuel economy benefit expected of FA-4 oils comes by way of a recent Confidence Report issued by the North American Council for Freight Efficiency and Carbon War Room. The report focuses on the general benefit to mpg to be had by switching to a lower-viscosity CJ-4 or CK-4 oil, but also shows how moving all the way to FA-4 will up the increase.
The report shows ...Read the rest of this story


