Yes, it can be as low as 70%.Is it just the innovate sensor that's way off? It seems like every time I see someone post one of these sensors showing a reading....it's always in the 77-79 range. Lol. Ok for casual info I suppose.....but there's no way I would want it communicating with the computer and making tune adjustments. I'd rather test pump side and carry along my handheld with multiple ethanol % tunes if your ethanol source is that erratic.
That why factory cars are flex tune, and not tuned exclusively for 85% ethenol.