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Motor Oil Meeting FCA MS-12991 For RAM/Jeep Gen 3 EcoDiesel Engine

AMSOIL European Formula FS 5W-40 Synthetic Motor Oil The 3.0L EcoDiesel engine has been redesigned for 2020-21. Therefore, these motors now require a different motor oil type. The new third generation EcoDiesel motor will require a 5W-40 motor oil meeting the FCA MS-12991 standard. This new diesel engine is an option for Ram 1500, Jeep Gladiator and Jeep Wrangler models.

We can offer AMSOIL European Formula FS 5W-40 Synthetic Motor Oil for Gen 3 EcoDiesel Engines. This product meets the FCA/Chrysler MS-12991 specification.

The previous generation of EcoDiesel engines (2014-2018) required the use of heavy-duty 5W-40 diesel oil meeting the MS-10902 standard.

About The Chrysler MS-12991 Motor Oil Specification

MS-12991 is not a new motor oil specification and was not conceived specifically for the Gen 3 EcoDiesel motor.  It has been around since at least 2012. The Fiat 1.4L Turbo-charged MultiAir gasoline engine first required motor oil meeting this spec. This engine was found in the Fiat 500 starting in 2014 and Jeep Renegade starting in 2015.

This AMSOIL European FS 5W-40 has met the MS-12991 standard since 2013.

About AMSOIL European Formula FS 5W-40 Synthetic Motor Oil

The formulation of AMSOIL FS 5W-40 is 100% synthetic and has “Full-SAPS” (sulfated ash, phosphorus, sulfur). It meets the additive requirements of the FCA MS-12991 motor oil standard. “SAPS” levels are a common consideration in the European motor oil category.

AMSOIL European FS Synthetic 5W-40 offers protection against extreme heat and delivers superb turbo-charger protection. This oil is fortified with a healthy zinc level to fortify wear control. The 100% synthetic formula also delivers fast winter start-up protection. AMSOIL formulated this product with a robust detergent package to keep engine internals clean.

Note that AMSOIL has not listed the FCA MS-12991 specification on the product label at this time. We expect that this will occur in the coming months. AMSOIL Inc. supports the use of European FS Synthetic 5W-40 in applications requiring a motor oil with the FCA MS-12991 spec.

We can sell AMSOIL European Formula FS 5W-40 Synthetic Motor Oil at wholesale prices in Canada and the USA. Contact us for a price list using the form on this page. 

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Is 10W-30 Oil Too Thin For Ram 6.7L Cummins Engines?

A reader asks: I’ve got a 2019 Ram 2500 with the 6.7L Cummins diesel. My manual says to use 10W-30 motor oil meeting the MS-10902 or API CJ-4 specification. I’m used to running a 5W-40 or 15W-40 in my previous trucks. Isn’t 10W-30 a bit thin for this engine?

Our answer: We can assure you that a good 10W-30 diesel motor oil is safe for your engine. But let’s discuss an important detail to watch for on the oil bottle label. This detail will improve the odds that your engine will receive the best possible wear protection.

When buying diesel motor oil, look for the “API CK-4” designation. API CK-4 is the very latest diesel engine oil standard. It is backward-compatible with API CJ-4 and Chrysler MS-10902 (and therefore warranty-approved).

Is API CK-4 An Upgrade Over API CJ-4 Diesel Oils?

Yes. The API CK-4 standard has very lofty requirements in terms of oxidation resistance, shear stability and wear resistance. It is dramatically superior to API CI-4+ motor oils you may have used 15 years ago. It is even a significant step up from the previous API CJ-4 standard. One of the primary goals of the API CK-4 spec was to allow for the use of lower viscosity oils without sacrificing wear protection.

Why Did Chrysler Decide To Go With 10W-30 In The 6.7L Cummins?

The move toward thinner oils in engines, transmissions and differentials has been going on for years. The reason is simple. Automakers are under constant pressure to meet government-mandated fuel economy targets. Going to lower viscosity oils is a relatively simple way to make marginal mileage gains.

It may seem like wear control is being sacrificed to achieve slightly better fuel economy. This has not turned out to be the case. The motor oil industry is constantly raising the bar to strike that balance between improved fuel economy and satisfactory wear protection. The API CK-4 specification achieves this balance.

Is 5W-40 An Option In Newer 6.7L Cummins Engines?

All this being said, Chrysler does suggest that 5W-40 engine oil can be used in temperatures under 0°F (-18°C). So 5W-40 is certainly secondary option. If your engine is seriously modified or if the truck is used for extreme towing, 5W-40 is certainly viable. But again, under most conditions, 10W-30 diesel oil is perfectly safe.

Our Motor Oil Suggestions For RAM 6.7L Cummins Diesel Engines

We suggest AMSOIL synthetic diesel oils (of course). Some brands may meet the API CK-4 standard. AMSOIL CK-4 diesel products are designed to exceed this spec. Here are the options.

Signature Series Max-Duty Synthetic Diesel Oil is AMSOIL’s ultra-premium API CK-4 diesel motor oil line. It is available in both 10W-30 and 5W-40 for the Cummins 6.7. It is also available in 15W-40, 5W30 and 0W-40. This series is designed to out-perform on every front. The most important is wear control. Signature Series exceeds the Detroit Diesel Scuffing Test standard by 600%. It is also overbuilt for extended-drain capability.

Heavy-Duty Series Synthetic Diesel Oil is AMSOIL’s commercial-grade API-CK-4 diesel line. This line is also available in 10W-30 and 5W-40 for the Cummins 6.7L motor. It is also available in 15W-40. Heavy-Duty Series has a lower price tag for commercial fleets and cost-conscious consumers. But it still delivers top-notch wear protection. It beats the Detroit Diesel Scuffing Test standard by 400%.

In conclusion, check the bottle for the API CK-4 specification. You will receive the very latest diesel oil technology.

If you are interested in pricing for highly-effective AMSOIL Synthetic Diesel Engine Oils, contact us using the form on this page.

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Looking For Oil Filter Relocation And By-Pass Kit For Ram/Cummins 6.7L

A reader asks: Do you offer a dual bypass filter kit for the Ram Cummins 6.7L engine? I would like to move the stock oil filter and have the bypass filter in the same location.

Our answer: AMSOIL offers only a single remote bypass oil filter system for the Ram/Cummins 6.7L engine. The universal AMSOIL BMK23 dual bypass system cannot be adapted to the AMSOIL BMK34 Bypass Kit For Ram/Cummins Diesel EnginesCummins 6.7L diesel engine. AMSOIL used to offer the BMK25 dual remote system for Ram/Cummins engines, but this kit was discontinued back in 2012.

The single remote AMSOIL BMK34 bypass kit fits 5.9L and 6.7L Ram/Cummins engines made from 2004 to present. It is one of the easiest systems to install. This is a very cost-effective way to reduce wear and extend oil life.

The BMK34 kit includes everything needed for installation. The bypass mount and filter, all hoses/fittings and a billet aluminum oil fill cap (used to return clean oil into the engine) are included. The only item not included is a mounting bracket, as this is dependent on the owner’s preferred mounting location.

Benefits Of Bypass Oil Filters

The filtering ability of a bypass oil filter is vastly superior to the stock full-flow oil filter. Regular oil filters catch particles down to about 20 microns. The ultra-dense media of a by-pass oil filter removes fine particles and soot down to 2 microns.

Unlike a regular oil filter, the bypass filter draw oils at a much slower rate. At highway speeds, it takes over 5 minutes for all of the engine oil to make its way through the bypass system. With abrasive contaminants held in the bypass filter, only super-clean engine oil circulates through the engine.

If you are looking to maximize the lifespan of your 5.9L or 6.7L Cummins engine, this is a safe and easy way to do it.

We can sell AMSOIL bypass filter kits at wholesale in Canada and the United States. Contact us for a wholesale price list using the form in the page. Be sure to mention “bypass kit” in the “Questions or Comment” box.

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