Noticed a small patch of oil under the car yesterday, checked the oil level and it was about 3/4 on the dipstick. I topped it up to be safe and drove the car around until the engine was warm and checked it again. I thought I'd leave it for the night and see so I left some newspaper under the car and this morning it had small oil patches on it (near the gearbox ish, roughly just in front of where it meets the engine). Anyway, I checked the level and it had gone down but barely so it seem's a very slow leak. I've booked it into a garage tomorrow, is there anything I could mention to the guy that might help, are there any common problems?