[Hayes21890]

Hey guys, just had my wife's X5D oil changed last week by a qualified shop. Only drove it maybe 300 miles since then and last night the oil light came up when we turned the car off. iDrive says "engine oil at minimum level, add 1 quart of oil". Any ideas? We added 1 quart of Moutl oil (which is what it was changed with) and no leaks have been seen on the driveway. Car has about 85k miles. Any help is greatly appreciated!