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<h2>What does an oil filter do?</h2>An oil filter is an essential component of a vehicle's lubrication system. Its purpose is to remove contaminants and impurities from the engine oil, ensuring that the oil stays clean and provides effective lubrication. Car oil filters consist of a cylindrical housing with a filter media inside, which captures dirt, metal particles, sludge, and other contaminants.<h2>Types of oil filters</h2><ul><li>Spin-on filters: Spin-on filters are the most common type found in vehicles. They have a self-contained design with the filter media and housing combined into a single unit. They are easy to install and replace during routine oil changes. The entire filter is typically replaced as a unit.</li><li>Cartridge filters: Cartridge filters consist of a replaceable filter element housed in a separate housing. When it's time for an oil change, only the filter element is replaced while the housing is retained. Cartridge filters are more environmentally friendly since only the filter element needs to be disposed of.</li><li>Magnetic filters: Magnetic filters use a magnet or magnetic material to attract and capture metallic particles in the engine oil. These filters are particularly effective in trapping small metal shavings and debris. They are often used in conjunction with other types of filters to enhance filtration efficiency.</li></ul><h2>What happens if you change the oil filter but not the oil?</h2>Changing the oil filter without changing the oil is not recommended. &nbsp;When you change the oil filter but not the oil:<ol><li>Contaminants remain: By not changing the oil, contaminants like dirt, metal particles, sludge, and combustion by-products will continue to circulate, potentially causing increased wear and damage to the engine.</li><li>Reduced filtration efficiency: The new filter may quickly become overwhelmed by the remaining contaminants in the old oil, reducing its effectiveness and potentially allowing contaminants to bypass the filter and circulate in the engine.</li><li>Degraded oil properties: Retained oil may have lost its lubricating properties, viscosity, and thermal stability, leading to inadequate lubrication, increased friction, heat, and potential wear on engine components.</li><li>Missed maintenance opportunity: Not changing the oil means missing out on the opportunity to remove contaminants, refresh the lubrication system, and ensure optimal engine performance through a comprehensive oil change.</li></ol>In short, changing only the oil filter without changing the oil can lead to retained contaminants, reduced filtration efficiency, potential engine damage, and missed maintenance benefits. It is best to perform complete oil changes for optimal engine health and performance.

Oil Filter

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Air Cleaner

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Air Filter Box

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Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

Car Oxygen Sensor Price From $24.99 | A-Premium

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Radiator

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Engine Cooling

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

BMW 325Ci Oil Filter