What else other than changing my oil and air filter can I do as far as tune ups go? I have an 04' V6 Touareg. My brother and I have a 78' Malibu with a 555 cu.in. that he and I put together so I'm pretty good with a wrench, but i'm wondering if there's anything I can do on my own so I don"t get raped at the dealer. Any advice is greatly appreciated.