91 Octane

Car felt quick but not too significantly faster than FBO stock turbo cars - possibly in my head, Noticed hesitation approximately halfway through the pull, was unsure if that was a misfire. Front end felt light but didn't feel any slip - on nitto nt555s 265s rear with a stance-y fitment (camber+lowered+slightly stretched tire). Ethanol Content sensor seems very off - ran tank to empty 3 times and filled with 91 each time before filling - Still reading high even at idle (18-19% with occasion extremely small duration spiking to 30-50%), possibly bad gas or normal for ACN91? Also noticed

Swapped to shell 91