FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

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'�NOTE:This draft dated 15 April 2006' by DasH - Page 65 of 460

FED-STD-791D

6.6 Carefully add a fresh 95-mL sample of the fuel to be tested and seal the sample bottle

with the plastic screw cap as before.

6.7 Repeat the shaking, settling, rating, and siphoning steps as described in 6.3 through

6.6 until ten cycles (or extractions) have been performed.

7. CALCULATIONS

7.1 This section is not applicable to the test procedure.

8. REPORTING

8.1 Report interface ratings as measured above. A rating of 3 or greater, denoting the

presence of water-reactive impurities is considered unsatisfactory. The initial formation of these

stable interfacial emulsions are indicative of potential filter-plugging and storage problems.

9. PRECISION

9.1 Precision data have not been developed for this method.

Method Prepared By:

Army - ME - 1986