Fuel system for diesel truck

A fuel system for a vehicle which includes an engine which consumes fuel, said fuel housed in a plurality of tanks, comprising:

• a first fuel tank, having a first interior portion, said first interior portion having a first upper portion and a first lower portion;
• conduit means for conducting fuel from said first interior portion of said first tank to said engine;
• a second fuel tank disposed on said vehicle from said first tank, said second fuel tank having a second interior portion, said second interior portion having a second upper portion and a second lower portion, said first and second upper portions generally the same vertical elevation;
• first fluid passage means extending between said first and second lower portions, said first fluid passage means extending vertically above said upper portions of said fuel tanks;
• and
• pumping means for removing air from said first fluid passage means, and wherein said first fluid passage means is filled with fuel and fuel is enabled to be siphoned from said second fuel tank to said first fuel tank and vice versa, through said first fluid passage means to equalize the levels in said first and second tanks.