[Gaz64]

A vehicle running closed loop engine management will use more fuel the higher the ethanol content goes.

O2 sensor activity and the target A/F ratio sends fuel trims positive to make up the difference.

Fuel consumption order worse to best E85, E10, 91, 95, 98 PULP, as tested for a local TV report.

Carbs require recalibration for anything over 10% ethanol.

Stoich ratios for fuels: petrol 14.7:1, ethanol 9.5:1, methanol 6.5:1 approx.

Obviously best power ratios are richer.