PLUS Classifications API currently licenses two PLUS classifications for use in the lower portion of the API Donut: CI-4 PLUS and SN PLUS. CI-4 PLUS identifies oils formulated to provide a higher level of protection against soot-related viscosity increase and viscosity loss due to shear in diesel engines. When originally introduced, CI-4 PLUS identified CI-4 oils meeting a higher level of performance. CK-4 and CJ-4 oils include all CI-4 PLUS performance requirements. SN PLUS identifies oils that meet API SN and are formulated to provide additional protection against low-speed pre-ignition for turbocharged direct-injection gasoline-powered vehicles. cycle diesel engines designed to meet 2017 model year on-highway greenhouse gas (GHG) emission standards. API FA-4 oils are not interchangeable or backward compatible with API CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4 and CH-4 oils. Refer to engine manufacturer recommendations to determine if API FA-4 oils are suitable for use. A downloadable English-, Spanish- or Chinese-language version of the guide is available from the API website at www.api.org/products-and-services/engine-oil/documents/ motor-oil-guide, and printed copies are available upon request to Kevin Ferrick at eolcs@api.org. Ferrick is API's senior manager for engine oil licensing. The API Service Symbol with FA-4 FA-4 and the FA-4 donut identify certain XW-30 oils specifically formulated for use in select high-speed four-stroke INDUSTRIAL CHEMICALS Lubricants & Metal Working Fluids Application: Engine Oil Performance Improver Recommendation: IRGALUBE® FE1 Engine Oil Additive Simple addition unlocks significant benefits. * Interacts with ZDDP to improve fuel economy, horsepower and acceleration. * Twice as effective as GMO. * Easy to handle liquid form. Monson, an Azelis company, is the best partner to solve your formulation needs. Call 1-800-235-0957 or email csr@monsonco.com. visit azelis.com/americas 61http://www.api.org/products-and-services/engine-oil/documents/motor-oil-guide http://www.api.org/products-and-services/engine-oil/documents/motor-oil-guide http://www.azelis.com/americas