Reinforced Bottom Plate
A reinforced 5mm bottom plate improves durability and provides additional protection in uneven terrain and off-road driving conditions.
PROJECT // AUXILIARY FUEL SYSTEM
REV. 2026 / V17.1
JEEP JL AUXILIARY FUEL TANK 69L
Auxiliary fuel tank system engineered to extend driving range while maintaining seamless integration with the factory fuel system and underbody structure.
TOTAL CAPACITY
150L
ESTIMATED RANGE
510km - 600km+
PRIMARY MATERIAL
Aluminum-Magnesium Alloy
Vehicle Fitment
MODELJEEP JL
YEAR2018+
ENGINE2.0T
FUELGasoline
ENGINEERING NOTE: Only fits 4-door models.
DATA SHEET
TECHNICAL SPECIFICATIONS
ENGINEERING DATA LOG
| MATERIAL | Aluminum-Magnesium Alloy |
|---|---|
| MOUNT POSITION | Chassis Side Mount |
| NET WEIGHT | 20KG |
| GROUND CLEARANCE | NO LOSS-HIGH CLEARANCE |
| COATING | Textured Black Powder Coat |
Capacity & Range
TOTAL FUEL VOLUME
150L
Factory: 81L + FK: 69L
EST. RANGE INCREASE
510km - 600km+
Fuel System Logic
SYSTEM TYPE
Auxiliary Siphon Transfer
Full-automatic siphon-based system. Fuel is seamlessly transferred to the primary tank via the factory venturi effect. This system requires no manual switches or auxiliary pumps, ensuring OEM-level reliability for long-distance overlanding and touring.
Gauge Behavior: The factory gauge reflects the combined capacity of both tanks. The initial half of the gauge represents fuel being drawn from the 69L auxiliary tank. Once the auxiliary fuel is depleted, the gauge will transition to tracking the 81L primary tank. Your Range (DTE) is dynamically calculated by the vehicle based on real-time consumption—typically adding a massive 510km - 600km+ of extra buffer for your journey.
Structure & Protection Design
01
02
Internal Baffle System
Internal baffles help control fuel movement inside the tank, improving vehicle stability and fuel pickup reliability on uneven terrain.
03
Heat Shield Protection
Integrated heat shielding reduces exhaust heat exposure and helps protect fuel system components from excessive temperature.
04
Strap Shield Protection System
Recessed mounting pockets allow the tank straps to sit flush within protected zones, reducing the risk of strap damage or snagging when sliding over obstacles off-road.
05
Quick-Connect Fuel Line Fittings
Equipped with OEM-style quick-connect fittings for secure sealing, simplified installation, and reliable fuel line connections.
06
Integrated Drain Port
An integrated drain port allows fuel to be safely drained for maintenance, repairs, or long-term storage without removing the tank.
07
Direct Bolt-On Installation
Designed to mount to factory locations using original mounting points. No chassis cutting, drilling, or permanent modifications required.
08
Individual Serial Identification
Each tank is marked with a unique serial number for product identification, quality tracking, and authenticity verification.
Weight & Material Engineering
Designed to reduce weight without compromising strength, ideal for long-range and overland use.
ENGINEERING CHOICE
FK ALUMINUM TANK
20KG
- MATERIALAL 5052
- PROTECTIONNATIVE ANTI-RUST
- BEST FOROVERLANDING
TYPICAL ALTERNATIVE
TRADITIONAL STEEL
56KG
- MATERIALMILD STEEL
- COATINGEASY TO CORRODE
- IMPACTHIGH CHASSIS LOAD
TECH DOC // INSTALLATION
Installation & Technical Notes
EST. TIME
2-3 Hours
DIFFICULTY
100% Bolt-on
CHASSIS MOD
NONE
EXHAUST MOD
NONE
PUMP MOD
NONE
Installation Video Guide
What's In The Box
69L Auxiliary Fuel Tank: Optimized for transmission-side fitment.
Mounting Hardware: Factory-compatible mounts and brackets.
Protection: Integrated heat shield for proximity components.
OEM Standards: Vehicle-specific fuel lines and fittings included.
Mounting Hardware: Factory-compatible mounts and brackets.
Protection: Integrated heat shield for proximity components.
OEM Standards: Vehicle-specific fuel lines and fittings included.
SYSTEM VARIANTS
Other Engineering Configurations
Global Shipping
Available to most countries. Hassle-free international delivery.
Secure Packaging
Reinforced packaging engineered for heavy-duty fuel systems and long-distance maritime transport.
Delivery Time
Estimated 25–40 days depending on destination, shipping method, and local logistics conditions.
LONG-TERM ASSURANCE
3-YEAR WARRANTY & SUPPORT
Built to support long-term ownership, not just short-term trips. We provide transparent coverage for the life of your expedition rig.
TANK BODY
3-YEAR STRUCTURE
Full structural coverage against manufacturing defects under normal off-road usage.
COMPONENTS
LIFETIME SUPPORT
Ongoing technical support and replacement parts availability for original owners.