We have just replaced one of our cars with a decent used car, the (franchised) dealer offered a deal of the next 2 services for £299. Now the car has a 20K service interval which is pretty much 2 years apart on the use it will get. Can even spread the fee interest free. My cynical brain thinks where is the catch? Servicing to cover next 4 years with a proper franchise stamp in the service book for £300! seems a no brainer.. what am I missing? or perhaps nothing?