
The fuel filter in a Ram Cummins engine should be replaced every 15,000 miles or 12 months, according to the manufacturer. This is because the fuel filter is vital to the health and protection of the engine's fuel system. However, some owners suggest that the filter can be replaced less frequently, at around 8,000 miles, as the manufacturer's recommendation can be costly.
| Characteristics | Values |
|---|---|
| How often does a Ram Cummins require fuel filter replacement? | Every 8,000-15,000 miles or 12 months, depending on the model. |
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What You'll Learn
- Fuel filter replacement is required every 15,000 miles, 12 months, or as prompted by the instrument cluster display
- The primary fuel filter, fuel-water separator unit is mounted to the driver side of the engine
- model engines use a single fuel filtration unit
- and newer engines employ two fuel filtration units
- Fuel filter changes can be expensive, with OEM fuel filters costing $200 or more

Fuel filter replacement is required every 15,000 miles, 12 months, or as prompted by the instrument cluster display
The 2007 to 2012 model years rely solely on this filtration assembly, while 2013 and newer trucks employ an auxiliary filter mounted on the frame rail between the fuel tank(s) and engine. The fuel filter(s) should be replaced at 15,000-mile intervals, every 12 months, or promptly after a "fuel filter service required" or "water in fuel" message is presented in the instrument cluster display.
Filter replacement is vital to the health and protection of the 6.7L Cummins' fuel system. The high cost of OEM fuel filters for the 6.7 Cummins can shock first-time owners. When the work is done at a dealership, it is not uncommon to be quoted $300 or more for this basic maintenance item.
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The primary fuel filter, fuel-water separator unit is mounted to the driver side of the engine
For all 6.7L Cummins turbodiesels, the primary fuel filter, fuel-water separator unit is mounted to the driver's side of the engine. This is the case for all 2007 to 2012 models, which rely solely on this filtration assembly. From 2013 onwards, an auxiliary filter is mounted on the frame rail between the fuel tank(s) and the engine.
The fuel filter(s) should be replaced at 15,000-mile intervals, every 12 months, or promptly after a "fuel filter service required" or "water in fuel" message is presented in the instrument cluster display. One source recommends changing the filter every 8,000 miles. This is because water and other contaminants can build up in diesel fuel.
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2007-2012 model engines use a single fuel filtration unit
The 2007-2012 model engines use a single fuel filtration unit. The fuel filter replacement is required every 15,000 miles or 12 months, or as prompted through the instrument cluster display. The primary fuel filter, fuel-water separator unit is mounted to the driver's side of the engine. The 2013 and newer 6.7L Cummins engines employ two fuel filtration units.
The fuel filter replacement is vital to the health and protection of the 6.7L Cummins' fuel system. The high cost of OEM fuel filters for the 6.7 Cummins can shock first-time owners. Depending on where you shop, simply having fresh OEM fuel filters installed can run $200 or more. In comparison, FASS Fuel Filters run $50-60 and are very easy to install at home.
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2013 and newer engines employ two fuel filtration units
2013 and newer 6.7L Cummins engines employ two fuel filtration units, while 2007 to 2012 model engines use a single fuel filtration unit. The primary fuel filter, fuel-water separator unit is mounted to the driver side of the engine. The newer trucks have an auxiliary filter mounted on the frame rail between the fuel tank(s) and engine. Cummins requires that the fuel filter(s) be replaced at 15,000-mile intervals, every 12 months, or promptly after a "fuel filter service required" or "water in fuel" message is presented in the instrument cluster display. Filter replacement is vital to the health and protection of the 6.7L Cummins' fuel system.
The 15,000-mile interval is recommended by Cummins and is also mentioned in the owner's manual. However, some owners may choose to extend the interval to reduce costs, as fuel filter changes can be expensive. For example, OEM fuel filters for the 6.7 Cummins can cost $200 or more, and it is not uncommon to be quoted $300 or more when the work is done at a dealership.
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Fuel filter changes can be expensive, with OEM fuel filters costing $200 or more
The recommended fuel filter service interval is 15,000 miles, 12 months, or as prompted through the instrument cluster display. However, some sources recommend changing the fuel filter every 8,000 miles. This is because water and other things can get into diesel fuel, which can cause issues.
To save money, some people opt for FASS Fuel Filters, which cost $50-60 and are easy to install at home.
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Frequently asked questions
Every 15,000 miles, or every 12 months.
The fuel filter is vital to the health and protection of the engine, so not replacing it could cause serious damage.
Depending on where you shop, it can cost $200 or more.
Yes, you can replace the fuel filter yourself. FASS Fuel Filters are very easy to install at home and cost $50-60.
It is recommended to change the fuel filter every 8,000 miles.










































