Who did you get the car from? Did you get the car 2nd hand? Have you followed the service schedule? Who normally does the servicing? Stating that using 5w-30 would damage the valve seals is indeed odd as the manual recommends using 5w-30 oil. Car was brand new. Dealer serviced but missed first service by 5k km. Problem is. Burning oil and masses of blue smoke on start up. When I had it checked out, the service manager told me it was the oil that I had used and also stated that the oil should not need to be topped up between services (which I had been doing regularly) as it should only move down the dipstick by 3 or 4 mm between servicing. Being the first absolutely brand new car I have ever owned I am a little peeved. Thanks for your replies