What kind of oil does a Ford F550 take?
The oil specification for a Ford F-550 varies by engine and year; most modern F-550s with the 6.7-liter Power Stroke diesel require SAE 5W-40 full-synthetic diesel oil, while gasoline-powered models may use 5W-20 or 5W-30 depending on the year and climate. Always verify the exact specification in the owner’s manual or with a Ford dealer.
The following guide outlines typical oil types by engine type and year, how to choose the right grade, and how to confirm the exact Ford specification for your truck.
Diesel engines
For F-550s equipped with the current Power Stroke diesel, the oil choice is driven by emission controls and engine design. Here are the usual options you’ll encounter:
- Oil grade: SAE 5W-40 full-synthetic diesel engine oil
- Standards to look for: oil that meets API CK-4 (and is compatible with CJ-4) and is suitable for Ford diesel engines
- Capacity: roughly 11 quarts with a filter for the 6.7L Power Stroke, depending on configuration
Concluding for diesel engines: use a 5W-40 synthetic diesel oil that meets API CK-4 and adhere to Ford's specific engine specs as listed in your manual or service bulletin.
Gasoline engines
F-550s that use a gasoline-powered setup (legacy 6.8L V10 or 6.2L V8) follow different recommendations, typically aligned with gasoline engine oil standards and viscosity suitable for heavy-duty gasoline use. Options commonly seen include:
- Oil grade: SAE 5W-20 or 5W-30, depending on the engine year and climate
- Standards: API SN Plus or newer for gasoline engines; check the manual for Ford-spec requirements
- Capacity: varies by engine and configuration; consult the manual for exact oil capacity
Concluding for gasoline engines: follow the grade and spec listed in the owner's manual; Ford dealers can confirm the exact requirement for your VIN.
How to confirm the exact oil specification for your F-550
To ensure you use the correct oil, check these sources: your owner's manual, the under-hood label, Ford's official website, or contact a Ford dealer with your VIN. If you’re unsure, ask for the "oil grade" and the "spec code" your engine requires, and ensure the oil meets the specified API service category and any Ford WSS specification.
Summary
Oil choice for the Ford F-550 depends on engine and year. Diesel models with the 6.7L Power Stroke commonly use 5W-40 synthetic diesel oil meeting CK-4, while gasoline versions typically require 5W-20 or 5W-30 depending on the year and climate. Always verify the exact specification in the owner's manual or with a Ford dealer to avoid mis-specification.
