The Ford Flex typically uses Motorcraft oil filters, with the exact part depending on the engine. For most Flex models, the standard 3.5-liter Ti-VCT V6 uses the FL-820-S filter, while the 3.5-liter EcoBoost version uses the FL-500-S filter. Always verify against your VIN or owner’s manual to be sure.
Two main engine options in the Ford Flex
The Ford Flex was offered with two primary gasoline engines during its production run. Knowing which one your SUV has is essential to selecting the correct oil filter.
- 3.5L Ti-VCT V6 (non-EcoBoost): commonly found in early Flex models and widely used across the lineup.
- 3.5L EcoBoost V6 (turbocharged): available on later models and higher trims, offering more torque and efficiency.
Having the right engine on your vehicle helps ensure you pick the correct filter and maintain proper oil flow and engine protection.
Motorcraft oil filter part numbers by engine
Below are the Motorcraft filter part numbers that are typically specified for each engine option in the Ford Flex lineup. Use these as a baseline, but always confirm with your specific year and engine code.
- 3.5L Ti-VCT V6: Motorcraft FL-820-S
- 3.5L EcoBoost V6: Motorcraft FL-500-S
If you’re unsure, check the filter canister on your current setup or consult your owner's manual or a Ford parts catalog using your VIN to confirm the exact replacement.
How to replace the oil filter on a Ford Flex
Follow these general steps to replace the oil filter and maintain proper lubrication. The process is similar for both engine options, with attention to oil type and capacity as specified for your model.
- Park on a level surface, apply the parking brake, and lift the front of the vehicle if needed. Support securely with jack stands.
- Place an oil catch pan underneath the engine. Remove the drain plug and let the old oil drain completely.
- Use a filter wrench to loosen and remove the old oil filter. Be prepared for residual oil to spill.
- Lubricate the gasket on the new filter with a small amount of fresh oil. Install the new filter by hand until it is snug, then tighten according to the filter’s instructions (typically about 3/4 turn after seating). Do not overtighten.
- Reinstall the drain plug with a new gasket if required. Clean up any spills.
- Refill the engine with the correct type and amount of oil as specified in the owner's manual. Start the engine, check for leaks, and recheck the oil level with the dipstick, adding oil as needed.
Professional service can perform this for you if you’re not comfortable with DIY maintenance.
Summary
For Ford Flex owners, the oil filter choice hinges on the engine. The 3.5L Ti-VCT V6 typically uses FL-820-S, while the 3.5L EcoBoost uses FL-500-S. Always verify by engine code, year, or VIN to ensure you order the correct part. Regular oil and filter changes are essential for long engine life, and you can perform the replacement yourself with the right tools or rely on a trusted mechanic.