Slight leaks from the tubes, bought spares, wanted to change them. Hmmm, not quite as easy as I thought, so much so that the second one came out in bits, leaving a small bit of plastic floating round my engine. I sought assistance from experts and was told its not going to do major damage but an oil change may not be a bad thing to do. Arse.
Still, also changed the air filter whilst I was at it, not too bad a job when you dont take into account having to take the car to bits first.