How many gallons is a Cummins tank?
There isn't a universal "Cummins tank" size; tank capacity depends on the specific vehicle or equipment using a Cummins engine. In most consumer Cummins-powered pickups, fuel tanks typically fall in the 30–40 gallon range, but exact capacity varies with cab/bed configuration, trim, and options. To confirm for your model, check the owner’s manual or dealer spec sheet.
What counts as a Cummins tank and why capacity varies
Cummins engines power a wide range of vehicles, from light-duty pickup trucks to heavy-duty commercial equipment. Each application has different fuel-tank configurations determined by design choices and regulatory requirements. The result is a broad spectrum of tank sizes rather than a single standard.
Typical ranges for common Cummins-powered vehicles
Fuel-tank capacity is primarily influenced by the body style and model year. Below are approximate ranges found in many Cummins-powered pickups and work trucks; exact figures should be verified for your unit.
- 30–36 gallons for many light- and heavy-duty pickups with standard configurations
- Up to about 38–40 gallons in some extended cab/long-bed models or with optional fuel-tank configurations
- Some specialty or dual-tank setups can exceed 40 gallons, though these are less common
These ranges provide a practical sense of what to expect. Always verify your specific vehicle's capacity using official sources.
How to find the exact tank capacity for your Cummins-powered vehicle
To determine the precise gallons for your exact model, follow these steps. The process applies whether you own a Ram with a Cummins engine, a commercial vehicle, or equipment that uses a Cummins powertrain.
- Check the owner's manual or the service/maintenance section, which lists fuel-tank capacity for each configuration.
- Look on the door jamb sticker, fuel door, or interior data plate for a "fuel tank capacity" specification (some markets label it differently).
- Consult the original equipment manufacturer (OEM) build sheet or the dealer's spec sheet for your VIN; these documents often show the exact tank size and any optional tank configurations.
- Use the VIN to pull a detailed spec sheet from the manufacturer’s official site or contact a Cummins-certified dealer for an exact figure.
Following these steps will yield the precise capacity for your vehicle, including any optional or dual-tank configurations that may apply.
Additional considerations
Note that tank capacity can change with model year, trim level, and regional variations. Some markets offer extended-range fuel tanks or dual-tank setups intended for longer range in commercial or off-road use. If you’re planning trips or fuel management, it’s wise to plan with the exact spec rather than a generic estimate. If you’re asking about fuel tanks for Cummins generators or other industrial equipment, capacities vary widely and are specific to the model and fuel type rather than automotive standards.
Summary
There is no one-size-fits-all answer to "how many gallons is a Cummins tank." The capacity depends on the vehicle or equipment configuration using a Cummins engine, with common passenger and heavy-duty pickups typically in the 30–40 gallon range, and some configurations offering larger tanks. Always refer to official spec sheets or the owner's manual for the precise figure. By verifying your exact model, you can better plan for fuel range and maintenance scheduling.
How big is the fuel tank on a 5.9 Cummins?
Let's face it, the factory 35 gallon fuel tank that comes factory on your 5.9L or 6.7L Cummins just does not cut it. This 60 gallon direct replacement tank will allow you to keep going down the road while others are stuck looking for fuel stations.
How big is the fuel tank on a Ram 2500 diesel?
The fuel tank size for a Ram 2500 diesel varies by model year and configuration, but recent models typically have a 31 to 34-gallon tank, with an optional 50-gallon tank available on Crew Cab models with an 8-foot bed. Older models may have different capacities, and aftermarket tanks can offer even larger options, such as 55 gallons.
Fuel tank sizes by configuration
- Standard: A 31 to 34-gallon fuel tank is standard on many recent models.
- Optional 50-gallon: This larger, optional tank is available for Crew Cab models with an 8-foot bed on recent model years (2023 and newer).
- Aftermarket: Aftermarket tanks, like those from Titan Fuel Tanks, offer options to increase capacity, such as 55 gallons for some 2013-2024 models with the 6.7L Cummins diesel.
Factors that affect tank size
- Cab and bed size: The size of the cab and bed significantly impacts the available space for the fuel tank.
- Trim level: Certain trims, like the Power Wagon and Rebel, may not be available with the optional 50-gallon tank.
- Model year: Older models have different tank sizes; for example, the 2003–2012 models had a stock 35-gallon tank with 60-gallon aftermarket options.
How many gallons does a 6.7 Cummins hold?
A 6.7L Cummins engine typically takes 12 quarts (or 3 gallons) of oil, although the exact capacity can vary slightly by model year. For 2019 and newer models, the capacity is 12 quarts with a filter change, and for older models (2007.5–2018), it is also 12 quarts with a filter change.
- Oil: A 6.7L Cummins engine requires about 12 quarts (or 3 gallons) of engine oil.
- Model year variations: While 12 quarts is the standard for most modern engines, older models may have slightly different capacities, so it's always best to check your owner's manual or use the dipstick to confirm.
- Coolant: The coolant capacity for a 4th generation 6.7L Cummins (2010-2018) is about 5.7 gallons.
- DEF (Diesel Exhaust Fluid): The DEF tank size is 5.5 gallons for 4th generation models (2010-2018).
- Fuel: The stock fuel tank can hold approximately 32 gallons on a 4th generation model, but aftermarket tanks with larger capacities are available.
Do trucks have 30 gallon tanks?
The average fuel tank size for trucks ranges from 20 to 40 gallons.
