I took our Nissan Murano to the dealership for a 50% off deal on an oil and filter change. Of course, they also included a 'free' maintenance and safety check, which could show up a serious deficiency that might merit immediate attention, but it's also a fishing expedition to round up some possible service business. One of the items on their long list of things they 'recommend' be done, is replacing the engine's six spark plugs. For just that alone, including the sales tax, they want almost $400. That's just insane. Back when I was driving the bus, I would have to work 26.5 hours just to pay for them installing SIX new sparks in that Nissan. The total for performing all the service items they want us to have done, is about $1700. I asked the service guy if they had to pull the engine to get those plugs into that thing, he gave me some vague answer on how much they had to do to access those plugs.