[Raypro]

I called my Ford dealer today as I got an automated message from them saying I'm due for a check-up, I called them back and the only thing I'm due for now at 90,000km's is an oil change and tire rotation which I go elsewhere for. He tells me just to call back when I hit 100k as I'll be due for spark plugs, fuel filter, pcv valve and some other things I don't remember that he says will amount to $500. This sounds like a stupid price to me but what I'm wondering is do I need to go to the dealer for this check-up even though I'm still under warranty until 120k? Or can I just find out everything that's due for a change and get it elsewhere and still have my warranty valid?