gampla, an average car does 10k a year, do you think anyone would buy a subaru if you had to pay £100's every 6 months for a diff rebuild? (honest question)
i haven't seen oil change recommendations as low as 3,750 miles before, usually 6k miles or 6 months on the classics and 10k miles or 12 months on the new age
good idea to have a full service done (by a garage that you trust), when you have the cam belt done make sure they change the pulley's too