The second biodiesel purchase

So I bought biodiesel again, in the same place, for the same price as last time. But today petrodiesel was 0.70 PLN more expensive per liter ($0.22 per liter, $0.83 per gallon).

The fuel efficiency was 7.6 liter per 100 km (31 MPG), slightly better than the long-term average. Biodiesel, keep up the good work!