In the 2022 F-150 and Expedition owner's manuals Ford states: "If you use your vehicle regularly above the altitude of 7500 ft (2,286 m) and under the temperature of -4.0°F (-20°C), it is recommended to use the alternative engine oil", where the "alternative engine oil" is 0W-30 instead of the normal 5W-30. Why do you think altitude makes a difference?
Here is an excerpt from the manual:
Materials
Alternative Engine Oil for Extremely Cold Climates
To improve engine cold start performance, use the following engine oil in climates where the ambient temperature reaches -22.0°F (-30°C) or below.
Materials
Note: If you use your vehicle regularly above the altitude of 7500 ft (2,286 m) and under the temperature of -4.0°F (-20°C), it is recommended to use the alternative engine oil.
Here is an excerpt from the manual:
Materials
Name | Specification |
---|---|
Engine Oil - SAE 5W-30 - Synthetic Blend | WSS-M2C961-A1 |
To improve engine cold start performance, use the following engine oil in climates where the ambient temperature reaches -22.0°F (-30°C) or below.
Materials
Name | Specification |
---|---|
Engine Oil - SAE 0W-30 - Synthetic Blend | WSS-M2C963-A1 |
Note: If you use your vehicle regularly above the altitude of 7500 ft (2,286 m) and under the temperature of -4.0°F (-20°C), it is recommended to use the alternative engine oil.