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From my years of tuning my focus ST/RS and doing datalogs, I’ve found my cars hated shell 91. They love chevron 91, but 94 was too inconsistent. Some tanks would be fine, others would actually pull timing on the top end. So I just stuck with chev 91.
Recently filled with co-op 91 and my car wasn’t happy
Edit: also that guys really nice. Met him at some cars and coffee. Missed him on the diamond rally because of the massive accident. But good to see local quality content. Check out his other rs3 videos
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