Quote:
Originally Posted by vitaminG
I've seen it discussed on here that chevon 94 octane is generally to 91 inferior in terms of knock resistance
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My old focus ST was tuned for 94, it was okay but trips to the interior were annoying. My current RS I was briefly tuned on 94 but it was absolutely not worth it. Every tank was super inconsistent, and we were able to keep the timing curve just about the same using 91, so that’s what I’m running now.
91+WMI > 94 any day of the week