6.7L Cummins Fluid Capacity

The oil capacity of a 6.7 Cummins varies based on the model year. Engines produced after model year 2010 need 12 quarts of oil, or 3 gallons of oil. 

Previous models have different oil capacities, with some older 6.7 Cummins engines having an oil capacity of less than 12 quarts and others requiring more.

The amount of oil your 6.7 Cummins needs can also vary based on whether you change the filter. If you don’t do so, the capacity is approximately 10 quarts. However, it is considered a best practice to change the filter when changing the oil to promote the cleanliness and long-term health of your engine.

Note that while the stated capacity is 12 quarts for post-2010 models, your particular vehicle may need slightly less than the full amount, and you shouldn’t force it just to hit the 12-quart mark. You don’t want to overfill the engine, as too much oil increases pressure and wear and tear on the oil pump and other engine parts.

Fluid Type Application Fluid Capacity Service Interval Fluid Spec Notes
Engine Oil 6.7L Cummins 12 QTS. 11.4 L 2007.5 - 2012: 7,500 miles/6 months
2013-2019: 15,000 miles/6 months/500 hours		 2007 - 2018 models: 15W-40 or 5W-40
2019+ Models: 10W-30 or 5W-40		 Use API CJ/CK-4 oil that meets specification standards MS-10902 Oil meeting Cummins CES 20081 standards may also be used. Low ash diesel engine oil is required.

Recommended:
2007 – 2018 models:
Blue Diamond PAO Synthetic 5W-40, Blue Diamond PAO Synthetic 15W-40, Green Diamond Synthetic 15W-40, Green Diamond Synthetic 5W-40

2019+ Models:
Blue Diamond PAO Synthetic 5W-40, Blue Diamond PAO Synthetic 10W-30, Green Diamond Synthetic 5W-40, Green Diamond Synthetic 10W-30

Torque for oil drain plug: 37 ft-lbs.
Fuel All models Short Bed: 31 gallons, Long Bed: 32 gallons, Long Crew Cab: 50 gallons — Ultra-Low Sulfur Diesel Recommend: Use Diesel Extreme every 6,000 miles and Everyday Diesel Treatment with every fillup. For additional lubricity, LX4 Lubricity Extreme may be used. In freezing temperatures, switch from Everyday Diesel Treatment to EDT+ Winter Defense for protection against fuel gelling.
Automatic Transmission 68RFE Rear-Wheel Drive 5.5 QTS.* Service Fill 120,000 miles (normal), 60,000 miles (severe) ATF+4 automatic transmission fluid Recommended: BLUE DIAMOND ATF+4/DEXRON III/MERCON V transmission fluid.
Use Shift Restore as a preventative maintenance product or to solve existing issues with the transmission.
68RFE Four-Wheel Drive 6.6 QTS.* Service Fill 120,000 miles (normal), 60,000 miles (severe) ATF+4 automatic transmission fluid Recommended: BLUE DIAMOND ATF+4/DEXRON III/MERCON V transmission fluid.
Use Shift Restore as a preventative maintenance product or to solve existing issues with the transmission.
AS69RC 7.2 QTS.* Service Fill 30,000 miles/24 months MOPAR ASRC automatic transmission fluid Use Shift Restore as a preventative maintenance product or to solve existing issues with the transmission.
Differential 235 American Axle Front Limited Slip Differential 4.8 pints 2007.5 - 2017: 15,000 miles/12 months (severe)
2018+: 20,000 miles (severe)		 75W-85 Synthetic GL-5 Gear Oil Recommended: 75W-90 Blue Diamond S9 Severe Gear Oil
267 American Axle Front Limited Slip Differential 4.4 pints 2007.5 - 2017: 15,000 miles/12 months (severe)
2018+: 20,000 miles (severe)		 75W-85 Synthetic GL-5 Gear Oil Recommended: 75W-90 Blue Diamond S9 Severe Gear Oil
292 American Axle Without Limited Slip Differential Rear 8.8 pints 2007.5 - 2017: 15,000 miles/12 months (severe)
2018+: 20,000 miles (severe)		 75W-85 Synthetic GL-5 Gear Oil Recommended: 75W-90 Blue Diamond S9 Severe Gear Oil
292 American Axle With Limited Slip Differential Rear 8.8 pints 2007.5 - 2017: 15,000 miles/12 months (severe)
2018+: 20,000 miles (severe)		 75W-85 Synthetic GL-5 Gear Oil Recommended: 75W-90 Blue Diamond S9 Severe Gear Oil
305 American Axle Rear Limited Slip Differential 8.8 pints 2007.5 - 2017: 15,000 miles/12 months (severe)
2018+: 20,000 miles (severe)		 75W-85 Synthetic GL-5 Gear Oil Recommended: 75W-90 Blue Diamond S9 Severe Gear Oil
305 American Axle Banjo Rear Limited Slip Differential 12.7 pints 2007.5 - 2017: 15,000 miles/12 months (severe)
2018+: 20,000 miles (severe)		 75W-140 Synthetic GL-5 Gear Oil Recommended: 85W-140 Blue Diamond S14 Severe Gear Oil
Diesel Exhaust Fluid SCR System 5 to 6.5 gallons As needed ISO 22241 / API Certified DEF Recommended: Hot Shot's Secret Premium DEFender to avoid SCR system issues.
Maintain DEF level to avoid speed limitation. Fill with at least 2 gallons if warning appears.
Transfer Case Borg Warner 44-49 3.8 pints 72 Months 60,000 mi./96 000 km. Mopar Transfer Case Lubricant, P/N 68089195AA Fill transfer case to bottom edge of fill plug opening.
Torque for fill & drain plugs: 18 ft-lbs.
Borg Warner 44-48 3.8 pints 60,000 miles/48 months (normal)
30,000 miles/24 months (severe)		 MOPAR BW44-44 transfer case fluid Fill transfer case to bottom edge of fill plug opening.
Torque for fill & drain plugs: 15-22 ft-lbs.
Borg Warner 44-47 3.8 pints 60,000 miles/48 months (normal)
30,000 miles/24 months (severe)		 MOPAR BW44-44 transfer case fluid Fill transfer case to bottom edge of fill plug opening.
Torque for fill & drain plugs: 18 ft-lbs.
Borg Warner 44-46 3.8 pints 60,000 miles/48 months (normal)
30,000 miles/24 months (severe)		 MOPAR BW44-44 transfer case fluid Fill transfer case to bottom edge of fill plug opening.
Torque for fill & drain plugs: 15-22 ft-lbs.
NV271/NV273 4.0 pints 60,000 miles/48 months (normal)
30,000 miles/24 months (severe)		 ATF+4 automatic transmission fluid Fill transfer case to bottom edge of fill plug opening.
Recommended: BLUE DIAMOND ATF+4/DEXRON III/MERCON V transmission fluid.
NV241/NV243/NV244 3.4 pints 60,000 miles/48 months (normal)
30,000 miles/24 months (severe)		 ATF+4 automatic transmission fluid Fill transfer case to bottom edge of fill plug opening.
Recommended: BLUE DIAMOND ATF+4/DEXRON III/MERCON V transmission fluid.
Brake Fluid All models — — DOT 3 —
Power Steering Fluid All models — — ATF+4 automatic transmission fluid Use MOPAR Power Steering Fluid +4, or MOPAR ATF+4.
Recommended: BLUE DIAMOND ATF+4/DEXRON III/MERCON V transmission fluid.
Engine Coolant With 68RFE Transmission 22.0 QTS. 120 Months or 150,000 mi./240 000 km. 150,000 mile/10 year antifreeze, 50/50 distilled water & coolant Recommend: Hot Shot's Secret 150k Antifreeze
With AS69RC Transmission 22.5 QTS. 120 Months or 150,000 mi./240 000 km. 150,000 mile/10 year antifreeze, 50/50 distilled water & coolant Recommend: Hot Shot's Secret 150k Antifreeze

6.7 Cummins Oil Capacity

Commonly found in Dodge Ram trucks, Cummins engines are diesel engines used in heavy-duty vehicles, including construction equipment, buses and trucks. Cummins engines are powerful enough for towing and hauling while still being relatively fuel efficient. They’re also known for being reliable and durable when properly maintained. Regular oil changes ensure that a 6.7 Cummins engine will go the extra mile for you.

When choosing an oil for a 6.7 Cummins engine, pay attention to the type as well as the quantity. You want to use the best oil for the engine to make the most of your truck.

6.7 Cummins Oil Change Intervals

The best way to reduce sludge buildup and oil dilution is to change the oil in your 6.7 Cummins engine at the recommended intervals. Oil change intervals vary based on the model year. The ideal interval can also vary based on the conditions you drive in and your driving style. 

For 6.7 Cummins engines with a model year between 2007.5 and 2012, the recommended oil change interval is 7,500 miles or every six months, whichever is sooner.

For models after 2013, the recommended interval is every 15,000 miles, six months or 500 hours of use, whichever is sooner. 

Generally speaking, if you drive your truck for extended periods without stopping, such as on highways, you can get more miles between oil changes. If you usually travel in city traffic or with a lot of starts and stops, it’s better to change your oil sooner.  

Best Oil for a 6.7 Cummins

Similarly, the ideal oil for a 6.7 Cummins engine also depends on the model year. 

For all models, synthetic oil is recommended over conventional oil. Synthetic oils have a higher flash point than conventional oils, plus additives that promote flow to reduce friction and engine wear. Although full-synthetic oils tend to cost a bit more upfront, they last longer and support greater engine longevity, which translates to long-term savings. 

The ideal viscosity grade varies based on the model year and your driving climate. Viscosity grade refers to the temperatures at which the oil operates. You’ll want to choose a viscosity grade based on the ambient temperatures in your area or in the areas where you use the vehicle. 

  • Model years 2007.5 to 2018: Choose a synthetic 15W-40 oil for temperatures above zero degrees Fahrenheit. For driving in all temperatures, including those below zero, choose a synthetic 5W-40 oil. 
  • Model years after 2019: Choose a synthetic 10W-30 oil for driving in temperatures above zero degrees Fahrenheit. To drive in all temperatures, including below zero, choose a synthetic 5W-40 oil. 

Vehicles Not Equipped With Passive Entry without pressing the brake pedal, cycle the ignition to the ON/RUN position. Do not start the engine. Vehicles Equipped With Passive Entry without pressing the brake pedal, push the ENGINE START/STOP button and place the ignition to the ON/RUN position do not start the engine.

Press and release the DOWN arrow button to scroll downward through the main menu to “Vehicle Info”. Press and release the RIGHT arrow button to access the “Oil Life” screen. Press and hold the RIGHT arrow button for one second to access the “Oil Life Reset” screen. Press and release the DOWN arrow button to select “Yes”, then press and release the RIGHT arrow button to select reset of the Oil Life. Press and release the UP arrow button to exit the Electronic Vehicle Information Center screen.

DIY Service Videos

How to Change Oil on a Ram 6.7L Cummins

Changing the engine oil and filter on a 2018 Ram 2500 with a 6.7L Cummins.6.7L Cummins is available in model years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020- current Ram trucks.

Get Hot Shot's Secret Engine Oil at https://bit.ly/33ZfjzG

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Choose Hot Shot’s Secret Oils & Additives

If you want the best oil for your 6.7 Cummins, Hot Shot’s Secret has many premium engine oil solutions to improve the performance of your diesel engine. Along with oil, we have premium fuel additives to further enhance your truck’s performance, including additives recommended for Cummins engines, like the Stiction Eliminator and Diesel Extreme.

Our oil solutions help reduce your emissions and promote cleaner running. You’ll enjoy faster acceleration and smoother starts, plus lower operating costs.

Browse our selection of diesel performance boosters online or contact our team to find out more. 

Diesel Extreme 1qt
Diesel Extreme
from $17.99
EDT 16oz Squeeze
Everyday Diesel Treatment
from $6.99
EDT+ Winter Defense 16oz
EDT+ Winter Defense
from $8.99
Cummins Cleanout Pack
Cummins Cleanout Pack
$71.70
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