[quote]quote:
Originally posted by Jimbo
Quote:
Originally posted by crazie.eddie
Stock GT is fine using medium grade. If you want better performance or if you have Stage 1, you should be using the higher octane rating.
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ED, how about turbo lite with stage 1?
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Stage 1 levels the playing field. If you start with an HO GT or a Turbo Lite and add S1 to either, you end up in the exact same place. Premium fuel is then recommended, although you could probably safely use mid-grade is needed. At around 10 cents a gallon more for premium I figure it's about a buck and half per tank more for the good stuff - so it's all I've used since putting S1 on my Lite.