The engine's capacity is 3.4 quarts of oil.It is 1 quart from the bottom dot to the top dot of the oil dipstick.Your engine requires 5w-20 but 5w-30 will work if you can't find it.If you have been driving around with that little oil for a long period of time...the oil would be the last thing I'd be worried about.Has your car been running hotter or has it overheated during this time?If yes, then I would have the car checked since low oil can cause damage to alot of engine parts.If your car is losing oil there are problems that need to be checked.