How Much Oil Does a 6.7 Cummins Take? (ISB 6.7 Oil Capacity)
When metal slides against metal, the two surfaces heat up. When they get hot enough they can weld themselves together. That problem becomes oil’s vital role. It stops welding from happening and makes sure your engine runs like a precision clock
One thing about diesel engines is you always have to consider the oil filter. It holds a lot of oil and while you may feel like it is full with 16 quarts, the oil capacity is 17.5. The oil filter takes an additional 1 1/2 quarts and it should be filled first.
To learn more about this topic just continue to read our article. You do not want to over-fill or under-fill your oil tank. Both situations can cause engine problems and make life a little less rosy. Take a few minutes to see how this important information can help you.
How Much Oil Does a 6.7 Cummins Take
You would think that this is an easy question to answer but it is not. So far we have got 3 different answers. The one we gave above came from the ESN sticker on the vehicle itself. The owner also checked with Cummins to make sure.
Other websites and owners have stated 12 and 11 quarts respectively. All three totals may be correct. The reason they may be correct is that one website said that the amount of oil depends on the installation.
For example, the 6.7 Cummins in a Dodge vehicle should only take 12 quarts. The 11 is minus the quart in the filter and the 17.5 should be for those 6.7 engines that have a deeper oil pan.
If you have checked with friends, either confirm with Cummins or your owner’s manual. There are slight differences when it comes to different models of the same engine.
Freightliner M2 Cummins Oil Capacity
This engine is not different from the 6.7 ISB motor. It has at least two oil capacities depending on which size of the oil tank was installed.
There is one model that comes with a 15-quart oil capacity and another that comes with an 18-quart size. Again, you should double-check those figures to make sure you know how big your oil tank is.
Start with your manual, if you still have it, and then check with Freightliner or Cummins to get their answer. Make sure to have the VIN so they can look it up in a hurry for you.
Always keep in mind that the filter may take at least a quart of oil. The big trucks are said to take up to 11 gallons of oil. You read that right but again, you should check with your manual or a good mechanic to make sure.
What Oil Does a 6.7 Cummins Take?
Generally, you are free to choose the brand that works best for you or which you prefer. As long as you get the SAE information correct, any brand will work. Some brands are just better than others.
The SAE is for normal weather- 5W 30, for moderate weather it is 10W 40. Another website said that for non-freezing temperatures you can use 15W 40 and for freezing temperatures down to -40 etc., you should use 5W 40.
We doubled checked and the latter is the figure for the 6.7 ISB Cummins. The former seems to be for the M2. As we said at the beginning of this section, the brand is not as important as the SAE.
At 3 - 4 gallons, you need to pick the best brand you can afford but is still good for your engine. Some people recommend Kroon’s oil but you have a lot of choices in this issue.
How Often Does a 6.7 Cummins Need An Oil Change?
The manual can say every 15,000 miles but not everyone is trusting that figure. Owners are free to make their oil changes when they feel it is the right time. For example, some owners change their oil and filter every 3500 to 5000 miles.
Some do it at 7000 miles, then others wait till the 15,000-mile mark but change the filter at 7500 miles. According to Cummins, when the vehicle is under extreme duty, the 15-quart oil tank needs to be changed every 9000 miles and the 18-quart option every 12,000 miles.
Extreme duty is when your “average fuel economy of 7mpg or less, and/or an idle time of greater than 40%.” You are free to change the oil anytime under the recommended mileage intervals recommended by Cummins. Just do not wait too long.
How To Change Oil 6.7 Cummins
You will need to have the right tools and supplies. Those items are a pail to drain the oil into, a socket and wrench to loosen the oil pan nut, and an oil filter wrench. Plus a rag or two to make sure any accidents are cleaned up quickly.
When you get the 12, 15, or 18 quarts you need, make sure it says CJ-4 on the label. It is also suggested that you stick with a Cummins Mopar filter. It is made for this engine.
Now you need to loosen the oil nut and let the oil drain. You can do the oil filter first or second and let the oil drain for at least 10 minutes. When you get ready to replace the filter, fill it with oil and put some oil on the gasket before you attach it to your truck.
Put the plug back in the tank making sure it is tight enough then add the new oil. That is about it.
Some Final Words
Oil capacities are easy to find. They are usually listed in the owner’s manual and you can always check with the manufacturer to make sure. The key to all of this is making sure you know what size of oil pan your vehicle has.
