My understanding of ethanol is it requires more fuel to be mixed with air than petrol. If used in a carby car for instance engine damage is likely due to lean mixtures.
Would a mixture display (they type that reads the exhaust gas sensor, say jaycar kc-5195 or kc-5300) be a good way to check the car is making the necesary adjustments to compensate for the ethanol? that way if it starts to read lean, it may be time to review the mix?

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cheers
Chris.
1990 landcruiser 80, 1HD-T two tank, copper pipe HE+ 20 plate FPHE, toyota solenoids and filters. 1978 300D, elsbett one tank system.