Introduction
The part number 84661-17 is the manufacturer's base number for the Motorcraft FL-820S, a high-quality spin-on oil filter. Motorcraft is the official OEM (Original Equipment Manufacturer) parts brand for Ford Motor Company vehicles. This oil filter is designed to meet or exceed the specific engineering requirements of Ford engines.
Its primary function is to remove contaminants (such as dirt, metal particles, and soot) from the engine oil, ensuring clean oil circulates through the engine to lubricate, cool, and protect critical components. Using the correct oil filter, like the FL-820S, is essential for maintaining engine performance, efficiency, and longevity.
Parameters / Specifications
The key technical specifications for the Motorcraft FL-820S (84661-17) are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 84661-17 (Motorcraft FL-820S) |
| Product Line / Type | Motorcraft Spin-On Oil Filter |
| Height | 3.66 inches (93 mm) |
| Outside Diameter | 3.07 inches (78 mm) |
| Thread Size | 3/4"-16 UNF (Unified Fine Thread) |
| Anti-Drain Back Valve | Yes (Prevents oil from draining out of the filter when the engine is off) |
| Bypass Valve Setting | 8 - 11 psi (Protects the engine if the filter becomes clogged) |
| Gasket Outside Diameter | 2.94 inches (74.7 mm) |
| Weight (Approx.) | 0.50 lbs (0.23 kg) |
| Filter Media | Synthetic Blend |
Application Scenarios
The Motorcraft FL-820S oil filter is a maintenance part used in a wide range of vehicles, primarily from Ford, Lincoln, and Mercury. Its application is centered around routine vehicle service.
Typical application scenarios include:
Routine Engine Oil Change:
This is the primary application. It is installed during a standard oil and filter change service on compatible vehicles to ensure continued engine protection until the next service interval.
Engine Protection for Passenger Vehicles:
Used in cars, SUVs, and light trucks to filter out abrasive particles that can cause wear on engine components like bearings, camshafts, and cylinder walls.
Vehicle Maintenance and Repair:
Installed by professional mechanics in auto shops and dealerships, as well as by DIY enthusiasts performing their own vehicle maintenance.
Common Vehicle Applications (Always consult your owner's manual for the correct part):
Ford: Many models of F-150, Mustang (V6 and V8), Explorer, Expedition, and others with various V6 and V8 engines.
Lincoln: Navigator
Mercury: Mountaineer
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