For me it's not about saving money for the car. I got mine changed out and they asked me what i want for my replacement and they gave me the price break down. I went w/ the expensive brand (since i am SC) b/c it's just better for the Engine itself and i won't have to worry about cheap parts breaking down in the future. You really can't go wrong w/ OEM parts. You might be able to save money by getting info on what spark plugs the dealer uses and just go your local auto store and buying the same brand that the dealer uses.