Yaris/Scion & Vitz :: Fuel Gauge Begins To Blink When Last (lowest) Level Indicator Box?

Yaris 2006 Fuel Gauge. How much fuel is in the tank begins to blink when the last (lowest) level indicator box? According to the manufacturer's technical data for the reservoir has a volume of 42 l so that, if the indicator is divided into eight levels, should mean that at the start blinking in a tank remaining 42/8 = 5.25 l. Checked this? And how much is left when you start "blinking faster"?

Statement of kilometers that still can not get the remaining fuel in the tank, at least for me, unreliable and virtually useless - probably was chosen because of those who drive hundreds of miles, with nearly constant spending on long highway tours. And to me it happens about once a year. The data in the display are obviously obtained by dividing the remaining amount of fuel consumption average. It would be more useful to Yaris, you already know that the remaining amount of fuel, the display and print it over to my calculations, I knew I would Ceme - by his calculations, we are rarely used.

Perhaps the simplest way to what the Yaris is calculated back to that from which it started and get what we are interested in:

For example. If the display says that the average consumption of 5 l/100km and that the available fuel may even exceed 150 km should mean that the left in the tank for 5/100 x 150 = 7.5 liters.

It seems to me that this sentence correct, I see no other way he could predict how many kilometers could go with the remaining fuel.