Car is a 2000 model Mazda 323 astina
It has a 1.6L 4cyl engine. I use the car to drive from Nowra to Sydney on the weekends and to work in sydney traffic on the week days.

I have been filling up with fuel in Sydney and Nowra, the average concentration of ethanol in my tank has been 66%.

Kilometers travelled	Litres used	Fuel % Alcohol in Tank	Litres used per 100km	$ Value of fuel mix in tank per litre	Cost $ per 100km
8391.80	868.59	65.97	10.29	1.17	12.03

this is $ 1016 worth of fuel to travel 8391 km.

If I was using E10  I estimate the cost would have been $767 for the fuel
based on $1.60 per litre and an economy of  9.14 litres per 100km