Be sure to check with the Auto or Truck Manufacturer to find the correct SIZE of Oil Filter for your vehicle. Amazon's Parts Locator says that the Motorcraft  FL820S does not fit my 1995 Mercury Grand Marquis, 4.6 Litre V-8 engine. This is incorrect. The fact is that the Motorcraft FL820S is the FORD-recommended filter for my 1995 Mercury engine, and is recommended in almost every application of the Ford /Mercury/Lincoln 4.6 Litre engine size.The Motorcraft FL820S interchanges with the BOSCH 3410, the FRAM TG2, and the K&N; 2010.The Motorcraft FL820S  has over 50 pleats, high flow rate, silicone anti-drainback valve, and steel end caps.Amazon's current low price ($3.69) is an excellent value for a quality oil filter that's MADE IN USA !!My car is driven in heavy traffic, desert temperatures, mountain driving, and trans-desert trips from Phoenix to L.A.The standard FORD Motorcraft Filters performed just as well as the high-dollar types -- and filtered MUCH better than the K&N;, which has a very high flow rate (for racing), but the low 90% efficiency rating of the K&N; makes it a no-no for extended oil changes. I wouldn't run a K&N; oil filter for more than 3,000 miles -- you'd just be stirring up dirty oil and pumping it through the bearings !! :>(For my American V-8 engine, I have found the best value to be the Motorcraft FL820S Oil Filter and Mobil 1 5-W-20 Extended Life (Synthetic) engine oil. The quality of the oil filter allows for filter changing every 5,000 miles, and the engine oil is changed once-a-year, regardless of miles driven.For maximum oil life, be sure your PCV system is working properly -- Remove and wash out the PCV Valve with Carburetor  Cleaner, and check for collapsed and/or damaged PCV hoses. A leaking PCV system will suck un-filtered dirt right into your engine !!1995 Mercury Grand Marquis RS225 HP 4.6 Litre SOHC V-8Modified Air Box w/ K&N; Air FilterBosch Impeller Fuel PumpBosch 19 Lb. Fuel InjectorsBosch Double-Platinum Spark PlugsBosch Mag-Core Ignition WiresBosch Oxygen SensorsMallory Adjustable Fuel Pressure RegulatorWalker H-Pipe Dual ExhaustWalker Sound FX MufflersUrethane Control Arm BushingsUrethane Sway Bar Bushings (Front&Rear;)Urethane Spring IsolatorsMOOG Coil SpringsMOOG Greaseable Ball JointsMOOG Greaseable Tie RodsGabriel ULTRA Gas-Pressurized Shock Dampers6.5 X 15 "Italian Lace" Alloy Wheels4-Speed Auto Trans w/ B&M; Shift Kit13,000 BTU B&M; Transmission Cooler