Separate Mileages for Different Fuel Types

[eudy]

Is there a feature in Fuelly to deal with separate fuel types for the same vehicle?

I live in Brazil and currently own a small pickup truck (the model is named Courier here but I know that in South Africa it's called Bantam).

Anyway, it's a Flex engine: it runs on gasoline or alcohol or any mixture of these two fuels.
I only use one type of fuel at a time.
I never mix the two.

Since alcohol consumption is higher than that of gasoline, in order to get separate statistics for the two fuel types in Fuelly, what I've doing is:
- if I consumed a tank of alcohol, I flag the fuel up as 100% city (lower mileage)
- if I consumed a tank of gasoline, I flag the fuel up as 0% city (higher mileage).

This way if I order the fuel up history by using the city% column, I can get separate alcohol (100% city) and gasoline (0% city) fuel consumptions.

Does anybody know a better way to do this?

TIA