The 2010 Ford Flex uses the Motorcraft FL-820S oil filter for its 3.5-liter V6 engine. This is Ford’s official replacement and the most common choice in parts catalogs for that model year.
Engine and filter compatibility
In 2010 the Ford Flex was equipped with a 3.5-liter Duratec V6 engine. That engine uses a standard spin-on oil filter, and Ford’s recommended replacement is the Motorcraft FL-820S. When you shop for a filter, make sure it matches the FL-820S specification to ensure proper sealing and oil flow.
About the FL-820S
The FL-820S is a widely used Ford/Motorcraft oil filter designed for a range of Ford engines. It features a full-flow design with an anti-drain-back valve to help maintain oil pressure on startup and during operation.
How to verify the right filter for your Flex
Before proceeding with any replacement, confirm the exact filter you need and avoid common mix-ups by following these steps:
- Inspect the current filter for the part number or size stamped on the metal canister.
- Consult the owner’s manual or the official Ford parts catalog for your VIN to verify the correct filter specification.
- Ask a parts retailer or Ford dealer to verify compatibility using your vehicle’s VIN.
- When replacing, use a new filter with the correct gasket and, if needed, replace the O-ring seal on the filter mounting properly.
Following these steps helps ensure you install the correct filter and avoid issues such as leaks or improper oil pressure.
Availability and cross-reference notes
The Motorcraft FL-820S is readily available from Ford dealers, parts stores, and online retailers. If you choose an aftermarket alternative, look for filters that specify FL-820S compatibility or the same dimensional and thread specifications (3/4-16 UNF thread, same gasket diameter) to ensure a proper fit and seal.
Summary
For the 2010 Ford Flex, the recommended oil filter is the Motorcraft FL-820S. Verify the correct part using your VIN or the existing filter, and replace with a compatible aftermarket option only if it matches the FL-820S specifications. This helps maintain proper oil pressure, filtration efficiency, and engine protection.