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Originally Posted by SoonerCamaro
Thanks thats super helpful! One question i thought of is what if im somewhere that doesnt have e85. Will putting 89 or 91 make my car run bad?
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If you don't have access to E85 then you probably don't want to spend money on the E85 sensor and tune. Your Camaro is already tuned from the factory with the ability to adjust to gas octane level. I wouldn't say that it will make the car run "bad" but the engine will reduce timing on lower octane fuel to prevent engine knock and that will lower engine performance.