Dear Doctor: I noticed the oil pressure light on my 2006 Hyundai Sonata stays on for several seconds when the engine is started, and is especially noticeable after an oil change. The oil light used to go off within 2 seconds. What should I do to correct any issues? Greg
Dear Greg: I recommend you check the oil filter. Factory oil filters (and good quality aftermarket oil filters) have anti-drain back valves and designs. This helps quicken oil pressure build-up when the engine is started. The oil pressure needs 9 pounds and up to shut the light out, depending on the vehicle. — Junior Damato, Motor Matters