Those flyers are simply bait to get people in the door. If they make it sound bad enough, how many people do you think would say, "go ahead"? The last time I went to a dealership I was told that the VCG and OFH needed service. I took a closer look later and it was such a minuscule amount that I haven't touched it a year later. Funny, I haven't had to add any oil since my last oil change and I check it on a regular basis.