The company’s API-licensed oils carry the current API and ILSAC engine oil licenses, along with the GM dexos1 gasoline engine oil approval. Royal Purple’s Synthetic Oil features enhanced ...

Cushing inventories—the benchmark crude stored and traded at the key delivery point for U.S. futures contracts in Cushing, Oklahoma—rose by 800,000 barrels, according to API data, after falling by ...

Industry specifications, such as API CK-4, provide assurance engine oils meet protective performance requirements through various testing protocols. Engine manufacturers will specify the oil ...