Fuel Grade for Supercharged '04

[Cdubya]

I've read all the threads about regular vs premium in an '04. Although a few always use one or the other, a majority seem to think it's okay to run regular with an occasional fill with premium.

My situation is a little different. I'm bidding on an '04 with a MagnaCharger. How does that effect the fuel question? Do I need to run premium all the time with the supercharger?

[Topspin]

With the added cylinder pressure the supercharger creates, I would only run premium fuel if it was mine.

[Achias]

Yes.

My maggie came with stickers to put near the fuel door saying that since it is supercharged, use only premium fuel.

It's kinda hard to see the dollars moving by so quickly when I fill up with premium, but Ilsa's worth it.

[xoxoxoBruce]

18 miles per gallon + 25 cents a gallon more for high test = only $14 per thousand miles.

[2005SSR6Speed]

Premium Fuel Only, this is due to compression and boost. The tunes are designed with premium fuels only.

[Cdubya]

Premium only it is!

Thanks to all for your help.