I found this to be very interesting, all this past summer here in Phoenix, AZ. My car has been registering 85-90% ethanol content through the sensor from my local pump. I recently filled up both of my cars and did a bottle test before pumping into my cars. The bottle shows 90% but my car is only registering it as 70-72% ethanol. My mustang is using a Haltech Ethanol sensor with my Elite ECU. In my BMW I have a inline Fuel-it brand ethanol sensor. Both sensors in both cars show 70-72% while bottle test show E90 before pumping it into both cars, there was 3 weeks between filling each car.
Anybody else experience this? Or can explain the variance between the bottle test and my vehicle's sensors?
Anybody else experience this? Or can explain the variance between the bottle test and my vehicle's sensors?