Just in the process of sorting out a new service plan and I've been offered an essential plan by a local dealership which is substantially cheaper than the Toyota plan.  It doesn't include pollen filter (I'm not bothered about that) or spark plugs which they have quoted as an extra £80 at it's 6 year service. The car has only just passed 30,000 and I'm quite capable of changing them myself (Eorocarparts are about £48).  Are they really necessary at 6 years with that mileage or is it ok to leave