Engineered specifically for Ford, Lincoln and Mercury vehicles, each Motorcraft® oil filter, including the popular Motorcraft® FL-1A, uses as many as 12 high-quality components. Construction features include:

• Steel Cases
  "Ironed" for a precise fit, fluted to ease removal and painted for rust-resistance.
  
  
• Pressure Relief Valve
  When it's cold outside or if the filter becomes clogged, oil flow through the filter can be reduced. If this happens, the relief valve opens to provide a continuous oil supply. Its design also minimizes the chance of contaminated oil recirculating back.
  
  
• Anti-Drain Back Valve
  This feature keeps oil in the filter to prevent "dry starts" after your engine has been turned off. It's made with specially formulated material that resists the aging effects that an engine's heat can cause.
  
  
• Efficient Filter Media
  Re-engineered media increases Motorcraft® filters' dirt-collecting capability, allowing them to capture more engine-harming particles than ever before.