Stock CR is 9.7:1
The SVT requires higher octane because of ignition timing and cams.
Just the CR alone does not warrant it as the 3L Duratec is 10:1 and uses 87 octane fuel.
Run a stock Contique on 87 octane and an SVT on the highest grade you can get (up to 93)
Chipped, Nitrous, or F/I owners should already know they need to run the best they can find.
Nitrous only needs it when the juice is flowing. The rest of the time it's just hurting performance & mpg in a regular Duratec! (get a flip chip!)
