Several years ago over here, the Government allowed the addition of up to 10% ethanol in fuel. Most don't use it and straight petrol is readily available everywhere. E10 was sold at 4c a litre less than pure petrol. This discount has been eroded and now stands at about 2c. I did the calculations at 4c cheaper and on an energy for your dollar basis, it still didn't add up. Fuel is much dearer now so the difference is even more detrimental to value.The lower energy content warranted a larger discount than that. The lower energy content reveals itself in more litres per 100 km.
It would be easy for a government to increase the cost of motoring by mandating E10 and not making a large enough allowance for the lower energy content. They're sneaky like that!
