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The rectangle diesel aluminum auxiliary tank is the most popular in the lineup. Our standard diesel auxiliary fuel tanks range from 30 to 80 gallons. If you want to keep most of your bed space check out our more slender aluminium fuel tank designs, some only require 9". We also have a lay down style that fits under most crossover toolboxes.

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RDS 18 Gallon Rectangle General Purpose Fuel Tank (Chrome Cap)

This is the RDS 18 Gallon Rectangle General Purpose Fuel Tank with Chrome Cap. This general purpose fuel tank…

Manufacturer
RDS Manufacturing
Model
RDS-62533
RDS 18 Gallon Rectangle General Purpose Fuel Tank

This is the RDS 18 Gallon Rectangle General Purpose Fuel Tank. This general purpose fuel tank is perfect for…

Manufacturer
RDS Manufacturing
Model
RDS-59044
RDS 20 Gallon Rectangle Diesel Auxiliary Fuel Tank

This is the RDS 20 Gallon Rectangle Diesel Auxiliary Tank. This tank offers extra fuel capacity for a generator…

Manufacturer
RDS Manufacturing
Model
RDS-72587
RDS 37 Gallon Rectangle Diesel Auxiliary Fuel Tank

This is the RDS 37 Gallon Rectangle Diesel Auxiliary Tank. Increase driving range with an auxiliary fuel tank! Auxiliary…

Manufacturer
RDS Manufacturing
Model
RDS-71804
RDS 40 Gallon Rectangle Notched Diesel Auxiliary Fuel Tank

This is the RDS 40 Gallon Rectangle Notched Diesel Auxiliary Tank. An Ideal option for fifth wheel applications. Auxiliary tanks…

Manufacturer
RDS Manufacturing
Model
RDS-70387
RDS 60 Gallon Rectangle Diesel Auxiliary Fuel Tank

This is the RDS 60 Gallon Rectangle Diesel Auxiliary Tank. Increase driving range with an auxiliary fuel tank! Auxiliary…

Manufacturer
RDS Manufacturing
Model
RDS-72771
ATI 30 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 30 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX30RIK
ATI 41 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 41 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX41RIK
ATI 46 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 46 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX46RIK
ATI 51 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 51 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX51RIK
ATI 66 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 66 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX66RIK
ATI 65 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 65 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX65RIK
ATI 58 Gallon Rectangle Diesel Auxiliary Fuel Tank

The ATI 58 Gallon Rectangle Diesel Auxiliary Fuel Tank is an excellent addition to your work truck.

Diesel installation…

Manufacturer
Aluminum Tank Industries
Model
ATI-AUX58RIK
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