Just picked my car up after having a service and MOT today at a vauxhall dealer in Manchester.
Tried a new vauxhall dealer this year after having suspisions that my car was treated badly by the last dealer I tried, so today as I dropped the car off made a note of the milage, average consumption (reset 5 miles away from the garage) and range from the trip computer. Milage was 57286, avg consumption 39.2 mpg and range 138 miles. Aso told them not to mess with the engine map incase they wrote over my remap (probably a mistake to mention this)
Picked the car up this evening, checked the trip computer before I left the dealer and the car had been driven for 5 miles, the range was now 112 miles and the average consumption down to 18.3 mpg
Spoke to the guy on the service desk and said I wasn't happy and that the car had obviously been abused for those 5 miles to get the fuel consumption to drop by 21mpg, he said he will speak to the technician tomorrow and give me a ring.
Sorry for the essay, but wondering where I stand with this, the car has obviously been thrashed from cold for those 5 miles so could have caused engine damage and tyre and clutch wear. I'm not complaining trying to get compensation, it is the principal of it, I don't thrash my car from cold so definitely don't expect someone else to do so, especially when I am paying stupid prices for a service in the first place.
Do I have cause to complain? Would it be best to speak to the service manager or Vauxhall Head Office? All help will be very welcome.