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I rotate refills with half tank 85 and then next fill up e10. Seems the insight works best up to an e40 mix before you get an dtc or ruin your mpg. Once you exceed e20 your mpg starts to pick up in warmer room temp like weather. You also get better throttle response.
Yeah, Ive seen the photos of supposed ruined or damaged fuel systems from ethanol, but those are from older vehicles.
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