Car is due its MOT and Service, I seem to be getting a good price at halfords/kwik fit with bluelight discount. However when I took it to Kwik fit twice before it failed both times, every year since passed with an independent garage. I was wondering if the independent garage would be more relaxed or if it is just coincidence that it failed when it did? also i usually go for an interim service but wondered if a oil and filter change is better value for money?