2002 impreza RS Major oil leak

some cars have a plastic/rubber drainplug..occaisionally this will come out of its hole..also look under the car for a ripped open oilpan.. this happens when the car bottoms out on city streets..may take 2 people to find the leak..is the leak new oil or blackened oil.. put a clean cardboard under the car to see how much and where it comes from..

Have the engine pressure washed then change the oil and install dye that glows under a UV light, then put the car on the lift and look for oil leaks after you drive it about 25 miles. Yes this is best left to a shop as the light is about $100.00 and the dye about $5.00. You can do the pressure wash top and bottom of engine at the car wash

if you have ever looked under these cars they have places for oil to go but not on the ground. keep and eye on the oil. did it run a little smoother with oil

check your turbo
turbos tent to leak from the seals also its always good to buy an oil catch can

Sorry to hear your bad news. Sounds like a major oil leak. First some introductory look sees. Looks for oil leaking near the filter. Did you recently have an oil change? If no - what is the mileage? To make a through diagnosis and repair you will need to get under the car most likely. I would STOP driving the car NOW. Get some jack stands and jack the car up and put the stands under it in a SAFE place. The owners manual will help to show you where your model is meant to be jacked and braced.
Wipe off all the oil you can and inspect for oil leaks CLOSEST to the FRONT of the car as wind will blow it backwards. With a high mileage car and the oil light or check engine light coming on. Check for oil leaks at the line - the oil pressure sending unit and the oil filter. These are the most common. If not one of these. Try to fill the oil again and if there is plenty of oil in the car - start it and lay under the car CAREFULLY and see if you can find oil escaping from somewhere on the engine. Also take your vin numbers down and call the local dealer to see if there is a recall on your particular car that somehow effects the problem your having it can save you thousands.

Hope this helps you get your car repaired and running again.

the check engine flashing means the engine is misfiring and can cause catalyst damage ,have it looked at right away,lots of problems with ignition coils and ignition wires causing misfires

replace with original equipment. Why did the oil dump?

get the oxygen sensor checkde out and the maf sensor...sounds like a vacuum leak too...Stop driving it and get it looked at ..if you dont see any loose hose's that are small in dia.. .then check those 2 sensors i spoke of ....

any major brand (like Pennsoil) 10W-30W

let me know.... as i'm guessing the oil plug was not properly tightened.... the oil wouldn't take long to drain especially if it was hot.

Robert