Why is a filter useful?

Where is the radiator drain plug on defender td5? How many quarts of oil does a 1998 Chevrolet Malibu 2.4 Liter Engine take? Your 1987 Honda accord rear lights and dash lites stopped working - the rear directionals and reverse lights still work -- any ideas? What type of alternator do you need for your 1999 Ford Windstar LX? What can you spray in your lawn mower carburetor for the mower to start? Is the PVC valve on a 1998 Chevrolet Prizm where you add freon? Is motor oil soluble in kerosene? How do you repair wheel rim rust on interior causing tire air leaks? 1997 Dodge Ram 1500 4WD Vacuum Check Valve location......Are both check valves the same part number? Why voltage regulation is required in alternator? What is the stock tire size for a 1997 Chevy Cavalier? How can you prevent static sparks by filling your pleasure craft fuel tank? What is the formula of meter to inches conversion? Where exactly is the PCV valve on a 2.2 liter 1995 Pontiac Sunfire and is it difficult to replace? Will a 1988 pickup windshield fit a 1999 windshield? Why wont this HP craftsman rider mower turn over it has a new battery and lights come on However motor and solenoid that looks as a starter neither try to turn over at all? Setting the timing on a 2001 Dodge Intrepid 2.7 engine where is the timing mark on the crankshaft to align with the top two cams? What is an indicator flasher unit? What does the check engine light mean on your r350? What direction does the drain plug on a 2000 gmc 1500ld light duty on the automatic transmissions turn you cannot seem to get it off either way of course you tried left first but still to no aval?