The humble oil filter might not be the most glamorous car part, but it’s arguably one of the most critical for your engine’s longevity. I’ve been working with Ford vehicles for over a decade, and there’s a reason why the Motorcraft FL-500S remains one of the most trusted filters in the industry. With 97% contaminant trapping efficiency, this filter isn’t just another maintenance item—it’s peace of mind in a steel canister. Whether you’re a weekend warrior or daily commuter, understanding what makes this filter special could save you thousands in potential engine repairs.

Key Specifications & Technical Details

Critical Dimensions and Components

The FL-500S oil filter features precise dimensions engineered for optimal fitment in Ford vehicles. Standing at 4.06 inches (103 mm) in height with an outer diameter of 2.94 inches (74.7 mm), this filter incorporates M22 x 1.5 mm threading for secure installation. The gasket dimensions are equally precise with an outer diameter of 2.753 inches (69.9 mm) and inner diameter of 2.397 inches (60.9 mm).

Advanced Filtration Technology

At the core of the FL-500S is its enhanced cellulose and synthetic blend filter media. This specialized combination captures particles as small as 20 microns—roughly one-quarter the width of a human hair. Such capability effectively removes harmful contaminants that can damage critical engine components over time.

Protective Systems

The filter incorporates a silicone anti-drain back valve that prevents oil from draining back into the crankcase when the engine is off. This silicone construction offers superior performance compared to rubber alternatives, particularly in temperature extremes. The bypass valve setting of 8-12 psi ensures consistent oil flow even when the filter approaches maximum contamination levels.

OEM Specifications

As a genuine Motorcraft part, the FL-500S corresponds to Ford OEM part numbers AA5Z-6714-A and BU2Z-6731-A. Weighing approximately 0.64 lbs (10.2 oz), it meets all Ford engineering standards for proper fit and function.

Superior Design Features

Robust Construction

The FL-500S features a precision-ironed steel case with carefully engineered flutes that facilitate easier removal during oil changes. The exterior receives a specialized paint coating that resists rust and corrosion, extending filter life even in harsh operating environments.

High-Efficiency Filtration

The filter media traps up to 97% of engine contaminants including dirt, debris, and metal shavings. This exceptional filtration efficiency directly contributes to extended engine life by minimizing abrasive particles circulating through critical components.

Temperature-Resistant Components

The silicone anti-drain back valve significantly outperforms rubber alternatives when facing extreme temperatures. This silicone construction maintains flexibility in frigid conditions and resistance to deterioration in high-heat environments.

Engineered Flow Characteristics

With an optimized flow rate of 10-12 GPM (gallons per minute), the FL-500S balances thorough filtration with proper oil delivery to engine components. The filter media is specifically designed to prevent collapse during pressure spikes that can occur during cold starts or high-RPM operation.

Vehicle Compatibility Guide

Ford Trucks and SUVs

The FL-500S serves as the recommended filter for America’s best-selling truck, the Ford F-150, across multiple engine options including both EcoBoost and naturally aspirated powerplants. It’s equally suitable for Ford’s SUV lineup including the Explorer, Edge, and Expedition—vehicles where reliable filtration is essential for family transportation.

Commercial Applications

Ford Transit vans benefit particularly from the FL-500S’s robust construction and extended protection capabilities, helping commercial operators maintain consistent performance through demanding service schedules.

Passenger Vehicles

For sedan applications, the FL-500S fits numerous Fusion and Taurus models with compatible engine configurations. The filter particularly excels when paired with Ford’s EcoBoost engines, which can place additional demands on filtration systems.

Verification Importance

While the FL-500S has broad compatibility across the Ford lineup, vehicle owners should always verify their specific year and engine combination before purchase to ensure proper fitment and function.

Performance Benefits for Your Engine

Extended Component Protection

By capturing particles as small as 20 microns, the FL-500S prevents premature engine wear on bearings, journals, and cylinder walls. This microscopic filtration capability proves particularly valuable in protecting precision components in modern engines with tighter tolerances.

Consistent Pressure Regulation

The filter maintains stable oil pressure even during extreme conditions—from cold-start situations to high-temperature operation. This pressure consistency ensures critical engine components receive proper lubrication under all operating conditions.

Contamination Management

By efficiently removing contaminants, the filter reduces the risk of oil degradation that can accelerate breakdown and compromise lubrication properties. This directly translates to more consistent engine protection throughout the service interval.

Dry Start Prevention

The silicone anti-drain back valve prevents dry starts—a condition responsible for up to 75% of engine wear. By maintaining oil in the filter when the engine is off, the FL-500S ensures immediate lubrication upon startup.

Ford-Specific Engineering

Engineered to Ford’s exact specifications, the FL-500S provides optimal performance with Ford engines by maintaining proper oil flow rates and filtration efficiency throughout the recommended change interval.

The Verdict on Value

After analyzing thousands of oil filters across dozens of vehicle applications, the Motorcraft FL-500S stands out as more than just another maintenance part. Its precise engineering, consistent quality, and specific design for Ford vehicles make it worth the slight premium over generic alternatives. When you consider that proper filtration can potentially add years to your engine’s life, the FL-500S represents an investment in your vehicle’s future rather than just another expense. For Ford owners seeking reliability and performance, this filter delivers exactly what your engine deserves.