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Spotlight: Engine Oil

Engine oil plays a vital role in the longevity of your Cummins Turbo Diesel engine. It lubricates moving components and cools critical subsystems, such as the VGT™ Turbocharger. Here are some tips to get the most out of this important part of regular maintenance:

Checking Oil Level
To ensure proper lubrication of your Cummins Turbo Diesel, engine oil must be maintained at the correct level. To obtain an accurate oil-level reading, check the oil level before starting the engine, after it has been parked overnight. That will ensure that all of the oil has drained from the engine into the oil pan. If you need to check the oil immediately after the engine has been running, be aware that it takes approximately 30 minutes for the engine oil to drain back into the pan after the engine has been in operation.

Checking the oil while the vehicle is on level ground will also improve the accuracy of the oil-level reading. There is no need to add oil until the level of the dipstick is below the ADD mark. And as a reminder, the total capacity from the LOW mark to the HIGH mark is 2 quarts (1.9 liters).

It is also important to note that overfilling or underfilling the crankcase will cause oil aeration or loss of oil pressure. That result could damage your engine, so never operate the engine with an oil level below the ADD mark or above the upper SAFE mark.

These are several key items to note when checking your oil that can have a substantial effect on the longevity of your Cummins Turbo Diesel engine.

Engine Oil Selection
Premiumblue - Original There are two key elements you should be concerned about when choosing engine oil: the viscosity, and the category, or spec, of the oil. For best performance and maximum protection in all operating conditions, Cummins recommends engine oils that are API CJ-4-certified and meet the requirements of Chrysler Group LLC MOPAR® – or an equivalent oil meeting Chrysler Material Standard MS-10902 – or Cummins CES 20081. Look for those engine oil designations on the back of your oil container to ensure that the oil you’re purchasing meets the appropriate standards. This oil spec is backward-compatible, and is recommended for all model years.

Temperature can affect your lubrication system, so let’s also talk about how ambient temperatures can drive requirements for different-viscosity oils. In ambient temperatures above 0 degrees Fahrenheit (-18 degrees Celsius), Cummins recommends that you use SAE 15W-40 engine oil. In ambient temperatures below 0 degrees Fahrenheit (-18 degrees Celsius), Cummins recommends you use SAE 5W-40 synthetic engine oil. As a reminder, the service interval for oil and filter changes must be followed when using synthetic oils.

In summary, keep these tips in mind to ensure your Cummins Turbo Diesel engine will be protected for many miles to come. For more information, consult your Owners Manual.

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