The exact location depends on which engine your Ram 2500 uses. In 2018 Ram 2500 trucks, you could have a gasoline 5.7L Hemi or 6.4L Hemi, or the 6.7L Cummins turbo-diesel. Each engine places the oil filter in a different spot, and access can vary with protective shields and exhaust components. Here’s how to find it for the most common setups.
Gasoline engines (5.7L Hemi and 6.4L Hemi)
On Ram 2500 gas engines, the oil filter is typically mounted on the side of the engine block toward the front of the vehicle. It is usually accessible from underneath, though you may need to remove a lower splash shield or other underbody components to reach it. The filter is a standard spin-on type.
5.7L Hemi V8
Location: On the passenger side of the engine block, toward the front, above the oil pan. Access is easier if the front skid plate or splash shield is removed; you’ll reach the filter by crawling underneath the truck.
6.4L Hemi V8
Location: Similar to the 5.7L, on the passenger side near the front of the engine block above the oil pan. Clearance may vary with optional equipment, so a quick check under the vehicle is recommended.
Diesel engine (6.7L Cummins Turbo Diesel)
The Cummins turbo-diesel uses a different filter arrangement that is typically located at the front of the engine bay. Access is usually from underneath after removing the front splash shield or protective panels. The filter may be in a canister or cartridge style, depending on the exact build, and may require a specific cap or tool to remove.
6.7L Cummins Turbo Diesel
Location: Front area of the engine bay, generally toward the side that’s easier to access from beneath the vehicle. Look for a cylindrical housing or cartridge-style filter near the front of the engine block. If you’re unsure, refer to the service manual for your VIN to confirm the exact location and replacement method.
How to confirm your exact location
Because Ram 2500 trucks can have different configurations by VIN and options, the most reliable way to confirm is to check the owner's manual or the service manual for your specific VIN. If you can’t locate a manual, visually inspect the front half of the engine bay from underneath for a cylindrical filter screwed into the block or housing, typically near the oil pan, and note whether it’s a spin-on canister or a cartridge-style setup.
Summary
For the 2018 Dodge Ram 2500, oil filter placement varies by engine. Gasoline models with the 5.7L or 6.4L Hemi typically place the filter on the passenger side of the engine block toward the front, accessible from beneath with protective shields removed. The 6.7L Cummins diesel usually uses a front-mounted filter in the engine bay, accessible from below after shield removal, and may be cartridge-style or canister-type. Always verify with your specific VIN’s manual and follow proper safety precautions when performing maintenance.