Are Volvo plugs really worth the vs the .50 for the Bosch Copper (FCP Groton prices)? I have a S70 T5, and I'm taking care of my 90K maintenance, and would like opinions on plugs. I think I read somewhere that if you change your plugs regularly, then the difference is less noticeable. Is this true? I can replace the Bosch plugs 4 times and still be cheaper than the . On the other hand, someone said that getting the Volvo plugs and wires is well worth it. Thanks.