My daughter has just bought her first car - a 2016 Nissan micra and it has an oil leak from the manifold. It is under 28 days warranty from trade centre UK. They have booked it in for repair but I am just concerned that there may be underlying problems and I should return it for a refund. It seems strange to me that a 3 year old car with only 22000 miles on the clock would have an oil leak. What do you think?