Another fill-up and another record - 1470km (913,4 miles) on one tank. Couldn't stand that small orange light screaming "feed me", so I've decided to fill up Berta's tank. And I've noticed that I needed to use starter much longer to start the engine. Probably because of first air bubbles sucked to the fuel lines. Berta's tank is divided to two sections with some pump and piping running fuel from one to another, so probably with a very low lever of fuel this system is not working efficiently. So it will be hard to dry the tank
But with some effort I should break 1000 miles barer with some fuel left in the tank.
Anyway another success is that finally I have 60+ mpg for 90 days!