2006? It is now 13 years later. The engine is not new so it burns oil. Not enough for you to visibly see at a speed so you can see it or smell it but it is being burnt. Why? because it is in the crankcase and splashes around everywhere. Also it is being stopped from going into the motor by rubber oil seals. Rubber (neoprene looks like rubber so I call it rubber) does not last forever and gets rock hard instead of remaining flexible. Once it is rock hard it is like a sock that does not have the elastic in it so it stays up the leg, but slides down to the heel. You know what I mean. When it ain't grabbing then the oil slips past the hardened seals and into the engine...and is burnt. Bit by bit.
. That is why it is YOUR responsibility to check the car for fluids once a week. That is why they made it so easy for you to check, with a DIP STICK, AND clear containers to see if you have coolant because you can see through it and air cleaner cover is a simple clip on cover. The manufacturer's could have sealed up all that stuff so you could do none of it. But they know stuff leaks. That is why you walk around your car and check the tires for air.
If you refuse to do the simple checks, the manufacturer is only too happy to sell you another car. You forked this one. Operator error. Car trade in value=0
"hardly drove it." You drove more than you thought you did.
The guy doing the oil change would not have forgotten to put oil in or you could not drive the car half a mile before it seizes. Some would not make it out of the parking lot. That can be traced back to the oil change shop.
Oil does not evaporate or dry up. It is there on the ground for centuries. There is no oil eating bugs or mold or anything that affects it. So burning is the only other answer.
I got in the habit of checking my oil & other fluid levels (transmission, brakes and coolant along with checking the condition of my belts and hoses under the hood and what the battery connections looked like or if I could see, the water level in the battery) DAILY and tire pressure if I was going out for a drive. If the car just sits in the garage then there is no need. But I pop the hood and check the oil BEFORE THE KEY GOES INTO THE IGNITION. 5 minutes of looking. BFD Better than breaking down on the side of a remote road in the dark during a rainstorm when the full moon is out and all the gangbangers are on the road.
. Getting to a cozy bar is more important to me.