The American Petroleum Institute is introducing a special Service Symbol Donut designed to help buyers differentiate between the new API FA-4 and CK-4 service categories for diesel-engine oils. The ...
WASHINGTON (May 20, 2016) — The American Petroleum Institute (API) is introducing a special “Service Symbol Donut” to help consumers identify the recently approved API FA-4 diesel engine oil. Earlier ...
The American Petroleum Institute will introduce a special Service Symbol Donut to help consumers identify the newly-approved FA-4 (PC-11) diesel engine oil. API approved two new diesel oil standards, ...
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