A vehicle comprising an engine and a pressurized liquid fuel system, the pressurized liquid fuel system comprising: fuel system components including a circulation system through which pressurized liquid fuel is adapted to be circulated, the circulation system comprising a feed portion upstream of the engine and a return portion downstream of the engine and the fuel system components comprise one or more fuel injectors arranged to inject some pressurized liquid fuel in the feed portion into cylinders of the engine; a first pressurized liquid fuel tank arrangement including a first fuel tank, a first fuel pump, a first feed line connected to the feed portion of the circulation system, and a first return line connected to the return portion of the circulation system, the first fuel pump being configured to pump pressurized liquid fuel from the first fuel tank to the circulation system through the first feed line the first return line returning pressurized liquid fuel to the first fuel tank from the circulation system; a second pressurized liquid fuel tank arrangement including a second fuel tank, a second fuel pump, a second feed line connected to the feed portion of the circulation system, and a second return line connected to the return portion of the circulation system, the second fuel pump being configured to pump pressurized liquid fuel from the second fuel tank to the circulation system through the second feed line the second return line returning pressurized liquid fuel to the second fuel tank from the circulation system; characterized in that the pressurized liquid fuel system further comprises: a liquid balancing conduit open to the first fuel tank and to the second fuel tank below a minimum liquid level of the first fuel tank and a minimum liquid level of the second fuel tank,wherein the first return line and the second return line have equal lengths and diameters so that the first return line and the second return line are configured such that a pressure drop across the first return line from the circulation system to the first fuel tank is adapted to be the same as a pressure drop across the second return line from the circulation system to the second fuel tank, the liquid balancing conduit comprises a liquid balancing valve, and the vehicle comprises a controller arranged to close the liquid balancing valve when the engine is off and to open the liquid balancing valve when the engine is on. fuel system components including a circulation system through which pressurized liquid fuel is adapted to be circulated, the circulation system comprising a feed portion upstream of the engine and a return portion downstream of the engine and the fuel system components comprise one or more fuel injectors arranged to inject some pressurized liquid fuel in the feed portion into cylinders of the engine; a first pressurized liquid fuel tank arrangement including a first fuel tank, a first fuel pump, a first feed line connected to the feed portion of the circulation system, and a first return line connected to the return portion of the circulation system, the first fuel pump being configured to pump pressurized liquid fuel from the first fuel tank to the circulation system through the first feed line the first return line returning pressurized liquid fuel to the first fuel tank from the circulation system; a second pressurized liquid fuel tank arrangement including a second fuel tank, a second fuel pump, a second feed line connected to the feed portion of the circulation system, and a second return line connected to the return portion of the circulation system, the second fuel pump being configured to pump pressurized liquid fuel from the second fuel tank to the circulation system through the second feed line the second return line returning pressurized liquid fuel to the second fuel tank from the circulation system; characterized in that the pressurized liquid fuel system further comprises: a liquid balancing conduit open to the first fuel tank and to the second fuel tank below a minimum liquid level of the first fuel tank and a minimum liquid level of the second fuel tank,wherein the first return line and the second return line have equal lengths and diameters so that the first return line and the second return line are configured such that a pressure drop across the first return line from the circulation system to the first fuel tank is adapted to be the same as a pressure drop across the second return line from the circulation system to the second fuel tank, the liquid balancing conduit comprises a liquid balancing valve, and the vehicle comprises a controller arranged to close the liquid balancing valve when the engine is off and to open the liquid balancing valve when the engine is on. a liquid balancing conduit open to the first fuel tank and to the second fuel tank below a minimum liquid level of the first fuel tank and a minimum liquid level of the second fuel tank,wherein the first return line and the second return line have equal lengths and diameters so that the first return line and the second return line are configured such that a pressure drop across the first return line from the circulation system to the first fuel tank is adapted to be the same as a pressure drop across the second return line from the circulation system to the second fuel tank, the liquid balancing conduit comprises a liquid balancing valve, and the vehicle comprises a controller arranged to close the liquid balancing valve when the engine is off and to open the liquid balancing valve when the engine is on.