Fact: I have a 1992 Ford explorer that I only change oil once every 6 months. I currently have 211,000 miles and the engine runs great and it still doesn't eat oil. (Therefore, I don't put in any extra oil until the oil change.) I have never had engine problems on this car yet.
Strange: The unusual thing about my car is that I've had over $10,000 of repairs on this car. However it was never directly related to the engine or my oil change intervals. There's has been so many repair on my car. Even the door hinges were replaced because of wear and tear.
Opinion: It's a ripoff to change your oil every 3 months. My car is proofs of it. I'm hoping that this engine makes it to 300,000. I will keep you updated.