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The Navy Coalescence Test (NCT) is a fit-for-purpose test which uses a specially manufactured small filter/coalescer cell to simulate the performance of a full scale filter/coalesce system while utilizing a small volume of fuel. This testing is designed to predict the performance of the filter/coalescer systems currently in use in the fleet. F-76 diesel fuel used onboard USN vessels is procured throughout the world through DLA contracting. Recent DLA sponsored studies have shown that in many countries there may be an undesirable concentration of Fatty Acid Methyl-Ester (FAME) present in the F-76. This study was conducted to determine an upper limit to FAME content at which its presence would not affect the coalescence properties of the F-76. This study showed that at 1% (v/v), FAME would not affect the coalescence properties of F76 following a fuel system flush and a filter change out. This contamination level passed the NCT and is recommended for further fit for purpose testing.

The Navy Coalescence Test (NCT) is a fit-for-purpose test which uses a specially manufactured small filter/coalescer cell to simulate the performance of a full scale filter/coalesce system while utilizing a small volume of fuel. This testing is designed to predict the performance of the filter/coalescer systems currently in use in the fleet. Recently the US Navy has embarked on a program to reduce dependence on foreign oil and utilize fuel from sources which are renewable within the United States. The fuel used in this test is made using camelina seed as the feed stock. The camelina feed stock fuel performed as well or better than petroleum based JP-5 in the NCT. Therefore it is recommended to continue with additional fit-for- purpose testing

The Navy Coalescence Test (NCT) is a fit-for-purpose test which uses a specially manufactured small filter/coalescer cell to simulate the performance of a full scale filter/coalesce system while utilizing a small volume of fuel. This testing is designed to predict the performance of the filter/coalescer systems currently in use in the fleet. Many diesel fuels are used in applications which require them to lubricate fuel wetted parts. To improve the lubricity of a diesel fuel specific additives are added into the fuel. One such additive, Infineum R655 was tested in a base fuel of petroleum F76 which is reported here. The additized fuel performed as well or better than non-additized F76 in the NCT. Therefore it is recommended to continue with additional fit-for- purpose testing.

The Navy Coalescence Test (NCT) is a fit-for-purpose test which uses a specially manufactured small filter/coalescer cell to simulate the performance of a full scale filter/coalesce system while utilizing a small volume of fuel. This testing is designed to predict the performance of the filter/coalescer systems currently in use in the fleet. Recently there have been numerous requests to test additives for diesel fuel and this test was conducted to create a petroleum non-additized diesel baseline. This test fuel met all the test requirements and passed the NCT. It is recommended for use in further NCT testing.