To answer this question, we called again on Universal Lubricants’ expert formulator Mike Wyant, Technical Services Manager.
The seal, commonly referred to as the “API donut,” is the seal of the American Petroleum Institute, a federal regulatory entity. Licensing engine oil guarantees that the oil meets all government standards for fuel economy, emissions control, wear control and other quality standards.
Following the API designation are the letters S and N. “S” indicates the “service” performance-level oil for cars, vans and light trucks. (As opposed to C for “commercial” heavy-duty trucks and diesel engines.) The “N” indicates that the oil meets all current specifications for high-temperature deposit protection for pistons, sludge control and seal compatibility. When new standards are set, the “N” will advance alphabetically.
At Universal Lubricants we are dedicated to keeping all our engine oils, including ECO ULTRA, in compliance with API’s current category specifications. API tests samples from the marketplace. If any oil is found to be out of compliance, depending on the severity of the failure, the manufacturer could receive a warning, be forced to issue a recall or even be fined or have a lawsuit brought against them.
Did you know?
- Whether oil is blended from virgin crude or re-refined, the protocol and specifications for meeting API SN certifications are the same.
- Every licensee, including Universal Lubricants, pays a licensing fee to API based on the gallons of licensed engine oil they sell per year, which includes all the ECO ULTRA re-refined oil.
- The viscosity grade and additional information is contained within the API donut.