AMSOIL has released more information on their brand new line of synthetic diesel engine oils. This extensive new line-up will be released in early 2017 and will cover a wide variety of industry specs and applications. The most notable specification is the new API CK-4 heavy-duty diesel motor oil standard.

AMSOIL API-CK-4 Diesel Engine Oils

AMSOIL’s 2017 API CK-4 Diesel Engine Oil Line-up

Latest News On Ford Power Stroke Engine Oil Controversy

You may have heard about Ford claiming that the new API CK-4 diesel oils can cause damage in Power Stroke diesel engines. Some API CK-4 oils have a phosphorus content of less than 1000 parts per million (ppm). Ford is contending that their testing shows accelerated valve train wear with some CK-4 formulations. For now, Ford is recommending the use of engine oil meeting the current API CJ-4 spec which has a phosphorous limit of 0.12% by volume (this works out to 1000 to 1200 ppm).

Here is why there is much confusion. It used to be that if an engine oil had both the API heavy-duty diesel and passenger car specifications on the label, the oil maker could abide by the higher phosphorous limit of the diesel spec. Some are suggesting that this loophole is now closed, implying that if an oil maker has both API CK-4 and the API SN (passenger car spec) on the label, the lower phosphorous limit (800 ppm) of the passenger car SN spec has to be followed. This is only partially true.

The API tells us that the phosphorous limit loophole still exists for most grades of heavy-duty diesel engine oil. The important distinction is that ILSAC viscosity grades (0W-30, 5W-30 and 10W-30) will have the lower phosphorous limit of 800 ppm, if a product carries the API SN spec along with API CK-4. Thankfully, 40-weight diesel engine oils can still have the API SN designation and abide by the higher phosphorous limit of the diesel spec.

There are indications that when the API SP passenger motor oil specification is introduced in 2018, diesel oils carrying both the SP and CK-4 specs will have to abide by the SP phosphorous limit. The way around this will be for an engine oil to carry the previous API SN spec instead of SP.

AMSOIL’s New API CK-4 Oils And Phosphorous Content

The only AMSOIL product that will have a lower phosphorous limit is the upcoming AMSOIL Signature Series 5W-30 Max-Duty Synthetic Diesel Oil. As a 5W-30 carrying the API SN spec, it has to abide by the SN phosphorus limit of 800 ppm. The phosphorus limitation does not apply to the rest of the new diesel engine oils, so there will be zero issues with using them in Ford Power Stroke Diesels.

All but the Signature Series 5W-30 Max-Duty will carry the new Ford WSS-M2C171-F1 spec which will designate them as safe and approved for all model year Ford Power Stroke engines. But that doesn’t mean that the Signature Series 5W-30 Max-Duty will be a lightweight. AMSOIL has indicated that it is loaded with anti-wear technology and will eventually be proven safe for Ford Power Strokes as well. But for now, they are leaving the Ford WSS-M2C171-F1 spec off of the label.

Note that the new AMSOIL Heavy-Duty 10W-30 Synthetic Diesel Engine Oil does not carry the API SN specification. Being a 10W-30, had they marketed it as an API SN product (for passenger car service), they would have had to defer to the 800 ppm phosphorous limit for API SN. Heavy Duty 10W-30 carries only heavy-duty diesel oil specs such as API CK-4. It also lists the Ford WSS-M2C171-F1 spec, making it suitable for Power Stoke engines.

Specifications Covered By the 2017 AMSOIL Synthetic Diesel Engine Oil Series

Here is a brief description of each of the brand new API CK-4 AMSOIL Diesel Engines Oils. This line will launch in February, 2017.

AMSOIL Signature Series 5W-30 Synthetic Diesel Engine Oil

This 5W-30 product is part is the “Max Duty” Signature Series of synthetic diesel oils. It will be a premium synthetic choice for modern diesel applications requiring a 5W-30. This product will not be replacing the “HDD” Series 3000 5W-30 Diesel Engine Oil. HDD 5W-30 will still be available for older diesel engines requiring the API CI-4+ spec. Here are the specifications covered by Signature Series Diesel 5W-30.

  • API CK-4/SN, CJ-4, CI-4+, CF
  • ACEA E9, E7, E6
  • Chrysler MS 10902
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DFS 93K222, DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MB 228.51, 228.31
  • MTU Type 3.1, 2.1, II, I
  • MAN 3677, 3575
  • JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC IV-10 LA, DQC III-10 LA
  • Scania LA-2

AMSOIL Signature Series 0W-40 Synthetic Diesel Engine Oil

At long last, AMSOIL will offer a heavy-duty 0W-40 diesel engine oil. This premium 0W-40 will be ideal for diesel engines that operate in extreme cold. It will also be suitable for year-round use. Here are the specifications covered by Signature Series Diesel 0W-40.

  • API CK-4/SN, CJ-4, CI-4+, CF
  • ACEA E9, E7
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MTU Type 2.1, II, I
  • MAN 3575
  • JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC III-10 LA
  • Ford WSS-M2C171-F1

AMSOIL Signature Series 5W-40 Synthetic Diesel Engine Oil

This product will replace “DEO” AMSOIL Premium 5W-40 Synthetic Diesel Engine Oil. This new API CK-4 5W-40 will be the go-to product for diesel pick-up owners looking for a premium motor oil. As it covers the Chrysler MS 10902 spec, it will also be the premium choice for Ram EcoDiesel pick-ups. The Ford WSS-M2C171-F1 spec will also be covered by this oil, making it a great option for all model year Ford Power Stroke engines.

  • API CK-4/SN, CJ-4, CI-4+, CF
  • ACEA E9, E7
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DFS 93K222, DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MB 228.31
  • MTU Type 2.1, II, I
  • MAN 3575; JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC III-10 LA
  • Allison TES-439
  • Scania LA-2

AMSOIL Signature Series 15W-40 Synthetic Diesel Engine Oil

Signature Series 15W-40 will replace the API CJ-4 “DME” AMSOIL Premium 15W-40 Synthetic Diesel Engine Oil. This will be AMSOIL’s premium 15W-40 for pick-ups and heavy-duty engines of all model years.

  • API CK-4/SN, CJ-4, CI-4+, CF
  • ACEA E9, E7
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DFS 93K222, DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MB 228.31
  • MTU Type 2.1, II, I
  • MAN 3575; JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC III-10 LA
  • Scania LA-2

AMSOIL Heavy-Duty Protection 10W-30 Synthetic Diesel Engine Oil

A 10W-30 diesel motor oil is often suggested for Ford Power Stroke engines in colder climes. The new Heavy-Duty Protection Synthetic 10W-30 will meet the Ford WSS-M2C171-F1 spec making it a safe choice for diesel engines in F-Series trucks. This new diesel 10W-30 will replace AMSOIL OE 10W-30 Synthetic Diesel Engine Oil.

  • API CK-4, CJ-4, CI-4+, CF
  • ACEA E9, E7
  • Ford WSS-M2C171-F1
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DFS 93K222, DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MB 228.31
  • MTU Type 2.1, II, I
  • MAN 3575
  • JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC III-10 LA

AMSOIL Heavy-Duty Protection 5W-40 Synthetic Diesel Engine Oil

This new 5W-40 Synthetic Diesel Oil will be moderately priced and a versatile addition to the line-up. It will cover the full spectrum of industry specs including API CK-4, Chrysler MS 10902 and Ford WSS-M2C171-F1. This will make it a great choice for budget-minded Ford Power Stroke and Ram EcoDiesel owners.

  • API CK-4/SN, CJ-4, CI-4+, CF
  • ACEA E9, E7
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DFS 93K222, DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MB 228.31
  • MTU Type 2.1, II, I
  • MAN 3575
  • JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC III-10 LA

AMSOIL Heavy-Duty Protection 15W-40 Synthetic Diesel Engine Oil

This new API CK-4 15W-40 will replace AMSOIL OE 15W-40 Synthetic Diesel Engine Oil. It will be moderately priced and ideal for fleets and commercial use.

  • API CK-4/SN, CJ-4, CI-4+, CF
  • ACEA E9, E7
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1
  • Mack EOS-4.5, EO-O
  • Detroit Diesel DFS 93K222, DDC 93K218, 93K215, 93K214
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins CES20086, CES20081
  • Volvo VDS-4.5, VDS-4, VDS-3
  • MB 228.31
  • MTU Type 2.1, II, I
  • MAN 3575
  • JASO DH-2
  • Renault RLD-4, RLD-3
  • Deutz DQC III-10 LA