Some 2017-2019 F-150 and 2018-2019 Expedition/Navigator vehicles built on or before 1-Apr-2019 and equipped with a 3.5L EcoBoost engine may exhibit excessive oil consumption with no visible oil leaks with or without diagnostic trouble code (DTC) P0365 and/or P0369
This may be due to a concern with the positive crankcase ventilation (PCV) system.
To correct the condition, follow the Service Procedure steps to verify the condition and replace the valve covers.
1. Visually inspect for engine oil leaks. Are any visible leaks present?
(1). Yes - this article does not apply. Refer to the Workshop Manual (WSM).
(2). No - proceed to Step 2.
2. Drain the engine oil. Remove and replace the oil filter.
3. Fill the engine with 4.7L (5 quarts) which is 1L (1 quart) less than the specified fill level.
NOTE: Make sure the vehicle is positioned on a level surface.
4. Run the engine for 3 minutes if hot or 10 minutes if cold. Turn off the engine. Allow for a minimum 15 minute drain back period and record the oil level shown on the oil level indicator by placing a mark on the backside of the oil level indicator.
5. Add the final 1L (1 quart) to complete the normal oil fill. Restart the engine and allow it to idle for 2 minutes. Turn off the engine.
6. After a 15 minute drain back period, record the location of the oil level by placing a mark on the oil level indicator at the new oil level location.
NOTE: Do not use the factory oil level indicator markings for the oil consumption test. Use only the markings applied to the oil level indicator in Steps 4 and 6.
7. Explain to the customer the factory-calibrated marks on the oil level indicator are where the oil should fall after an oil change with the specified fill amount. Explain this may vary between MIN-MAX or the upper and lower holes on the oil level indicator.
8. Record the vehicle mileage.
9. Advise the customer that oil level indicator readings must be taken every 320 km (200 mi) or weekly, using the revised marks as drawn on the oil level indicator. Remind the customer the engine needs a minimum 15 minute drain back, the vehicle must be placed on a level surface for an accurate reading and the oil level indicator must be firmly seated in the tube prior to taking the reading.
10. When the subsequent indicator readings demonstrate a 1 full liter (1 quart) has been used, record the vehicle mileage. Consider the drive cycle the vehicle has been operated under when making this calculation. It may be necessary to have the customer bring the vehicle in for a periodic oil level indicator reading to closely monitor oil usage.
(1). If the vehicle has traveled at least 4,800 km (3,000 mi) and oil consumption has not met or exceeded 1L (1 quart), the vehicle is operating normally and no repairs should be performed.
NOTE: Use only the marks applied to the oil level indicator during Steps 4 and 6 for oil consumption measurements. This is a more precise measurement that eliminates any variability in the markings on the factory oil level indicator.
11. Measure the distance between the mark made in Step 6 and the current oil level on the oil level indicator. Record this measurement in millimeters, the current vehicle mileage obtained in Step 10, and the beginning mileage recorded in Step 8 on the repair order.
12. Does the oil consumption measured exceed 1L (1 quart) in 4,800 km (3,000 mi) or less?
(1). Yes - replace both valve covers.
(2). No - the vehicle is operating normally, no further repairs are necessary. The repair is complete.