Diesel Fuel Filter Testing

The published test methods for diesel fuel filters are reviewed in the light of the conditions in service.

The measurement of diesel fuel filter performance in service is a long and costly process. The fact that most filters in service are choked by soft organic trace constituents of the fuel causes the greatest difficulty in laboratory testing. A test method which reproduces the organic choking effect has been described and is satisfactory for comparative tests; it has not been adopted as a standard owing mainly to difficulties associated with variability of the choking life measurement. A possible solution to this problem is suggested.