SAE J1681 Test Standard for Gasoline, Alcohol and Diesel Fuels

EUROLAB Laboratory provides accredited testing and conformity assessment services within the scope of SAE J1681 standard. This standard provides recommendations for test fluids that can be used to simulate real-world fuels.

Standardized test fluids must be used to limit the variability found in commercial fuels and fluids. Commercial fuels can vary significantly between manufacturers, batches, seasons, and geographic location. In addition, standardized test fluids are universally available and will promote consistent test results for materials testing.

Therefore, this standard; describes and defines commercial automotive fuel components, standardized components of material test fluids, a terminology for test fluids, preparations for test fluids, fluids for testing fuel system materials.

The purpose of this document is to describe and publish standardized surrogate gasoline and diesel blends to be used in materials testing. This document also encourages the use of standardized test fluids to allow for consistent results from material tests and more uniform properties of materials. The formulations in this document are intended to exaggerate the effects of typical severe fuel on materials while allowing tests to be performed within a reasonable time.

For the purposes of this document, the term FUEL is used with fully blended hydrocarbons or hydrocarbon oxygenate blends for use in commercial automotive engines. The term FLUID is applied to certain controlled mixtures of ingredients used to simulate the effects of fuels. Initially, such additives are injected and the resulting mixtures are used to evaluate whether these new additives will affect the fuel system materials.