ASTM D3945-93

1.1 These test methods measure the percent viscosity loss at 100°C of polymer-containing fluids when evaluated by either of two diesel injector apparatus procedures. Procedure A uses European Diesel Injector Test Equipment and Procedure B uses Fuel Injector Shear Stability Test (FISST) equipment. The viscosity loss reflects polymer degradation due to shear at the nozzle.

Note 1-ASTM Test Method D2603 has been used for similar evaluation of this property. It has many of the same limitations as indicated in the significance statement. No detailed attempt has been undertaken to correlate the results by the sonic and the diesel injector methods. Equipment and replacement parts are no longer available for Test Method D2603. Note 2-Procedure A of this method uses test apparatus as defined in CEC L-14-A-79, IP 294/76 and DIN 51382. The operational procedure is different on four specific points. Procedure A evaluates hydraulic-type fluids at 30 cycles, with viscosities measured at 100°C. Results are reported for single determinations. No equipment severity correction factor is used to adjust results.

1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.