Hi, not sure whether or not this is considered technical enough for the Tech forum, so if I'm misposting, sorry! I was just wondering if putting premium unleaded in my 00' V6 was really worth the extra cost. The guy who owned it before me happyhapp Just bought it today...my 25th b-day present!!) filled it with only premium, but I was under the impression that premium wasn't necessary, and didn't offer anythign other than a tiny bit cleaner burn. With gas rapidly becoming as valuable as liquid gold, I was hoping to shave a bit off my fuel costs, so if I'm not really gaining anything from it, I'd just as soon not pay extra. Can anyone tell me if it's really going to be worth it? My Mustang is stock now, so there's not any compression changes to speak of, I know that can affect the minimum octane required to prevent knock...but truth told, I just can't see how a domestic car less than 6 years old would need that high of an octane rating to run right.