Ram 1500 EcoDiesel Oil Capacity Chart by Year 2026

The Ram 1500 EcoDiesel oil capacity depends on the model year and engine generation. Most 2014 to 2019 Ram 1500 trucks with the Gen 2 3.0L EcoDiesel V6 take about 10.5 quarts, while 2020 to 2023 trucks with the Gen 3 3.0L EcoDiesel V6 take about 8.5 quarts.

Both generations use 5W40 full synthetic oil, but they do not use the same FCA material standard. That difference matters before you buy oil, refill the crankcase, or judge whether a shop used the correct amount.

Exact Ram 1500 EcoDiesel Oil Capacity Answer

For most Ram 1500 EcoDiesel oil changes, the capacity split is simple. The older DS body trucks use the higher fill quantity, and the newer DT body trucks use the lower fill quantity.

These are service-fill figures used for an oil change with a filter. Do not pour the full amount blindly. Fill slightly under the listed capacity, start the engine, check for leaks, let the oil settle, then finish the level on the dipstick.

The confusing break point is 2019 to 2020. A 2019 Ram 1500 Classic EcoDiesel belongs with the older DS generation, while a 2020 Ram 1500 EcoDiesel belongs with the newer DT generation.

Ram 1500 EcoDiesel Oil Capacity by Year

Use this chart when buying oil before a Ram 1500 EcoDiesel service. The capacity figures below match the widely published EcoDiesel maintenance split between 2014 to 2019 Gen 2 trucks and 2020 to 2023 Gen 3 trucks.

Do not choose EcoDiesel oil by viscosity alone. Gen 2 and Gen 3 use different FCA oil standards.

Diesel Resource lists 2014 to 2018 EcoDiesel capacity at 10.5 quarts and 2020 and newer capacity at 8.5 quarts in its Ram 1500 3.0L EcoDiesel maintenance guide. The FCA oil-spec communication also confirms that 2014 to 2019 DS Ram 1500 trucks use the Gen 2 3.0L EcoDiesel, while 2020 and newer DT trucks use the Gen 3 version.

Ram announced the EcoDiesel’s final run for the 2023 model year, so 2024 and newer Ram 1500 trucks do not use this oil-capacity chart. For broader used-truck context, Truck Guider’s Ram EcoDiesel years to avoid guide is the better next read.

How Gen 2 and Gen 3 EcoDiesel Engines Differ

The 2020 model year is the key break in Ram EcoDiesel oil service. FCA separates the 3.0L EcoDiesel V6 into Gen 2 and Gen 3 service categories, and those categories control the oil standard.

Gen 2 EcoDiesel Years

The Gen 2 3.0L EcoDiesel V6 applies to 2014 to 2019 DS Ram 1500 trucks. FCA’s STAR communication lists the Gen 2 oil as 5W40 full synthetic meeting FCA Material Standard MS-10902, with API CJ-4, ACEA E9 or E7, or ACEA A3 or B4 categories.

These trucks use the larger service fill. If you own a 2019 Ram 1500 Classic EcoDiesel, treat it as a Gen 2 truck for oil capacity and oil spec.

Gen 3 EcoDiesel Years

The Gen 3 3.0L EcoDiesel V6 applies to 2020 and newer DT Ram 1500 trucks with the diesel option. FCA lists the Gen 3 oil as 5W40 full synthetic meeting FCA Material Standard MS-12991 and API SN or SN+.

The same FCA document warns that using Gen 2 oil in a Gen 3 engine can lead to turbocharger deposits and reduced performance. That is why the correct oil spec matters as much as the fill quantity.

Which 5W40 Oil Spec Each EcoDiesel Needs

Viscosity alone is not enough on the 3.0L EcoDiesel V6. A bottle labeled 5W40 can still be wrong if it does not meet the correct FCA material standard for your engine generation.

The FCA STAR communication lists Mopar oil part numbers 68001332PB and 68231021GB for Gen 2 examples. It lists Mopar part numbers 05166241PA and 05166241GA for Gen 3 examples, along with Pennzoil Platinum Euro for the Gen 3 spec.

Before buying, read the back label. The safest match is the correct viscosity, the correct FCA material standard, and the correct API category for your EcoDiesel generation.

How Much Oil To Buy for One Service

Buy oil based on the full service quantity, not the rounded engine size. The 3.0L EcoDiesel V6 does not take three liters, and it does not use the same quantity as the 5.7L Hemi V8.

Replace the oil filter at the same service. Diesel Resource lists the engine oil and oil filter service interval at 10,000 miles, 16,000 km, or 12 months for the Ram 1500 EcoDiesel.

If you also own a gas Ram, do not copy oil quantity from another engine. Truck Guider has separate year-specific references for 2019 Ram 1500 oil capacity and 2020 Ram 1500 oil capacity.

How To Check Ram EcoDiesel Oil Level Correctly

The dipstick check matters because EcoDiesel capacity figures are service targets. They are not a reason to pour in every quart without checking the final level.

1. Park the truck level. A sloped driveway can make the dipstick reading look low or high.
2. Drain the old oil fully. Let the oil pan drain until the stream slows to a drip.
3. Replace the filter. A filter change affects final service quantity.
4. Add slightly less than full capacity. Stop about half a quart under the listed number.
5. Start the engine briefly. Check for leaks around the drain plug and filter housing.
6. Let the oil settle. Shut the engine off and give the oil time to return to the pan.
7. Top off slowly. Add small amounts until the dipstick reaches the safe full range.

Diesel oil turns dark quickly after a service. Dark color alone does not mean the oil was not changed, especially on an EGR-equipped diesel engine.

5 Common Ram EcoDiesel Oil Change Mistakes

Most Ram EcoDiesel oil-change problems come from treating every 3.0L EcoDiesel V6 the same. The engine generation, oil standard, and final dipstick check all matter.

Using Gen 2 Oil in Gen 3

This is the biggest spec mistake. FCA states that Gen 2 and Gen 3 oil API ratings are not compatible, even though both generations use 5W40.

Use MS-10902 for 2014 to 2019 Gen 2 trucks. Use MS-12991 for 2020 to 2023 Gen 3 trucks.

Filling Gen 3 Like Gen 2

A 2020 to 2023 Ram 1500 EcoDiesel does not use the older 10.5 quart quantity. Filling a Gen 3 truck like a Gen 2 truck can push the crankcase above the safe level.

Start with the correct 8.5 quart target, then verify the final reading with the dipstick.

Skipping the Oil Filter

Changing oil without changing the filter leaves old oil and contaminants in the system. The filter should be replaced at the same service interval as the engine oil.

For filter location context on the Ram 1500 platform, see Truck Guider’s guide to the 2019 Ram 1500 oil filter location.

Ignoring the Oil Life Monitor

The oil life monitor tracks use conditions, not only miles. Short trips, towing, heat, cold starts, and idling can all change how quickly oil life drops.

Do not reset the monitor unless the oil and filter were actually changed.

Checking Too Soon After Shutdown

A rushed dipstick check can read low because oil is still draining back into the pan. That can lead to unnecessary top-off oil and an overfilled crankcase.

Give the oil time to settle before the final reading. Then add oil in small amounts only if the dipstick shows it needs more.

Final Ram EcoDiesel Oil Capacity Takeaway

The safest Ram 1500 EcoDiesel oil capacity answer starts with your model year. Use about 10.5 quarts for 2014 to 2019 Gen 2 DS trucks and about 8.5 quarts for 2020 to 2023 Gen 3 DT trucks.

Both generations use 5W40 full synthetic oil, but the required FCA material standard changes. Match your oil to the correct generation, replace the filter, and finish the service by checking the dipstick instead of relying only on the bottle count.

Ram 1500 EcoDiesel Oil Capacity FAQ

How Many Quarts of Oil Does a Ram 1500 EcoDiesel Take

A 2014 to 2019 Ram 1500 with the Gen 2 3.0L EcoDiesel V6 takes about 10.5 quarts. A 2020 to 2023 Ram 1500 with the Gen 3 3.0L EcoDiesel V6 takes about 8.5 quarts.

What Oil Does a 3.0L EcoDiesel Ram Use

The 3.0L EcoDiesel V6 uses 5W40 full synthetic oil. Gen 2 engines from 2014 to 2019 require FCA MS-10902, while Gen 3 engines from 2020 to 2023 require FCA MS-12991.

Is 2019 Ram EcoDiesel Capacity Different From 2020

Yes. A 2019 Ram 1500 Classic EcoDiesel belongs to the Gen 2 DS group and takes about 10.5 quarts. A 2020 Ram 1500 EcoDiesel belongs to the Gen 3 DT group and takes about 8.5 quarts.

Can I Use Gen 2 EcoDiesel Oil in a Gen 3 Ram

No. FCA states that Gen 2 and Gen 3 EcoDiesel oil API ratings are different and not compatible. Using Gen 2 oil in a Gen 3 engine can cause turbocharger deposits and reduced performance.

How Often Should I Change Ram EcoDiesel Oil

Diesel Resource lists the Ram 1500 EcoDiesel oil and filter interval at 10,000 miles, 16,000 km, or 12 months. Follow your truck’s oil life monitor and owner manual if your driving pattern is severe.

Does Ram EcoDiesel Oil Capacity Include the Filter

The listed service-fill quantities should be treated as oil-change quantities with the filter replaced. Always confirm final level on the dipstick after startup and settling because drain time and service conditions can slightly change the final top-off amount.