Some fuel dilution of the engine oil may take place during normal operation. However, excessive fuel dilution is of concern in terms of possible performance problems.

1.1 This test method covers determination of the amount of dilution in crankcase oils of engines when gasoline has been used as the fuel.

There may be cases in dispute, therefore, the user of this test method is advised to establish whether this method will be accepted. There may be cases where Test Method D 3525 results will be set as the referee value.

1.2 The values stated in acceptable SI units are to be regarded as the standard.

This standard does not purport to address all of the safety concerns, 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. For specific precautionary statement, see 6.4, 7.1, and 9.3.