The new Gasoline Protection Program™ (GPP) performance specification was developed to support the recreational boating industry in helping provide long-term durability and overall consumer satisfaction with marine engines. With so many gasoline additive products and a myriad of marketing and performance claims, it has become increasingly difficult for boat owners to identify gasoline additive products formulated to withstand the rigors of use in marine environments.

The GPP performance specification covers packaged gasoline additive products formulated for use during normal operation and for storage. GPP registered gasoline additive products are recommended for use in gasoline, including ethanol-containing gasoline mixtures. Certified GPP registered products are recommended by the NMMA for use in engines where GPP registered products are specified in the owner's manual.

Specification Testing

Product formulations are tested against the Gasoline Protection Program™ (GPP) specification to show whether they provide improved oxidation/deposit control and water uptake prevention. They are also tested to ensure they do not cause corrosion and do not contain certain heavy metals. Improvement of these characteristics may result in the significant reduction of engine component wear. Always check your owner's manual to ensure you are using the proper additive product(s).

The GPP test suite includes five key performance tests designed to address:

  • Oxidation Stability
  • Corrosion
  • Water Uptake
  • Metals
  • Detergents (only if claiming detergents)



The products are received by the Center for Quality Assurance (CQA) and then are blind coded with a sample ID. The sample is submitted to ISO/IEC 17025:2015 accredited laboratories to ensure quality and consistency. The testing laboratories are approved by the National Marine Manufacturers Association (NMMA) Gasoline Protection Program™.

To learn more please contact Scott Berry or Bill Grzegorczyk.


  • Brochure

    Gasoline Protection Program™

    The Gasoline Protection Program™ (GPP) defines a level of performance for gasoline additive products that is exclusive to the NMMA. The GPP performance specification covers gasoline additive products formulated for use during normal operation and for storage. The GPP specification does not cover additives formulated for shock treatment.