Fuel storage instability reactions of middle distillate fuels continue to be a major problem for the Department of Defense. Unlike civilian fuels, military fuels can remain in storage tanks for one or more years. As fuels are drawn from these tanks, the tanks are subsequently topped off with more recently purchased fuels. In many cases, the mixed fuels are not compatible resulting in sediment and sludge formation. This fuel incompatibility results in degradation reactions that form solids which will plug nozzles and filters and render the entire contents of the storage tank unusable. Previous research has shown that certain specific polar organic nitrogen functional groups are involved in fuel instability reactions. These organonitrogen compounds are difficult to completely remove during refining. We report on a simple inexpensive procedure for the removal of these organonitrogen compounds before fuels are mixed in storage tanks.