Fuel Dilution %

Definition

Fuel Dilution is the amount of raw, unburned fuel that ends up in the crankcase. It lowers an oil's viscosity and flash point - creating friction-related wear almost immediately by reducing film strength.

Standard Test Method Used

FTIR - ASTM E2412

Reporting Measurement

%

Amount of Sample Needed

40 mL

Test Limitation

FTIR - High fuel saturation can result in false readings. If test produces inaccurate results, sample is tested using the Head Gas Analyzer. Head Gas Analyzer - Fuel dilution measured by the concentration of fumes in the sample's head gas. Mini Flash - If FTIR and Head Gas Analyzer tests are positive for fuel, flash point is tested to determine whether or not it is within specifications.

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