Oil Aeration Test

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

Run engine at 3000 RPM for 1 minute.
Take an oil sample from the engine oil temperature (EOT) sensor port at idle.
Inspect the sample for presence of air bubbles.

Method Check

Visual
Excessive oil aeration can be caused by depleted oil additives, pick-up tube leak, front cover seal leak, or upper pan seal leak.