The 2010 Ford Fusion’s hydraulic power steering system typically requires an ATF-type fluid, with Ford’s own Power Steering Fluid (PSF) being the preferred option. If PSF is unavailable, a Dexron II/III or Mercon-type ATF that is compatible with Ford PSF is generally acceptable. Always check the owner’s manual or confirm with a Ford dealer for your specific build date and engine option.
What the manual allows
For many 2010 Fusions with hydraulic power steering, Ford specifies a Dexron II/III/Mercon-compatible ATF or Ford Motorcraft Power Steering Fluid. The exact wording can vary by production date and market, so it is best to use Ford’s recommended PSF when possible or choose a compatible ATF that explicitly lists compatibility with Ford PSF.
- Ford Motorcraft Power Steering Fluid (PSF) — Ford’s official PSF designed for the factory hydraulic power steering system.
- Dexron II ATF or Dexron III ATF — widely accepted compatible substitutions for Ford PSF in many model years.
- Mercon ATF — another compatibility option often regarded as acceptable for Ford power steering systems when PSF is not available.
If you are uncertain about which fluid to use for your particular Fusion, consult the owner’s manual or contact a Ford dealer for the exact specification for your vehicle’s production date and engine type.
Check and maintain the power steering fluid
Keeping the hydraulic power steering fluid at the correct level and condition helps prevent noise and steering heaviness. The following steps outline a general procedure for inspection and topping up.
- Park on a flat surface, turn off the engine, and wait for the power steering system to cool.
- Locate the power steering fluid reservoir under the hood; check the markings on the side of the reservoir for the proper fill level.
- With the cap off, check the fluid level against the min/max indicators. If it’s low, add the recommended fluid a little at a time until it reaches the proper level.
- Inspect the area around the reservoir and hoses for signs of leaks, cracks, or seepage.
- Replace the cap securely and run the engine briefly while turning the steering wheel from lock to lock to circulate the fluid, then recheck the level and top up if necessary.
Regular checks help maintain steering performance and prevent damage to the power steering pump and hoses. If you notice grinding sounds, stiff steering, or visible leaks, have the system inspected by a professional promptly.
Summary
For a 2010 Ford Fusion with hydraulic power steering, the recommended fluids are Ford Motorcraft Power Steering Fluid (PSF) or a Dexron II/III/Mercon-type ATF that is compatible with Ford PSF. Always verify the exact specification from your owner’s manual or a Ford dealership based on your vehicle’s production date. Proper fluid selection and maintenance support smooth, reliable steering performance.