NEW 2017 DIESEL ENGINE OIL SPECIFICATIONS
New diesel engine oil spec’s were last introduced in late 2017 and they are changing continually. The CK-4 & FA-4 are for all newer diesel vehicles in the United States. The CK-4 spec is backwards compatible & the FA-4 is designed only for some 2017 and newer diesel engines (it is a lower viscosity) and AMSOIL has manufactured it and other spec’s now that engine manufactures warrant it. The CJ was the original spec, and it is now CK-4 is the current Specification is backward compatible for 2021 and older oil specifications. The CK-4 has outstanding performance with 75% more protection. AMSOIL CK-4 spec’d oils are available now in 15-40; 5-30; 10-30; 5-40 & 0-40 with 6X more wear protection than the industry standard. AMSOIL’S CK-4 spec’d oils by far out perform the earlier CJ-4 & CI+4 oils with only .09% of ash and better protection than the former CI+4 spec’d oils. AMSOIL will at a later date have the FA spec’d oils after manufactures agree with this spec and it is in demand. AMSOIL’s new CK oils will meet Fords new requirements , WSS-M2C171E along with all major engine manufacturers. Choose the best AMSOIL!
Now for the newest small diesel engines, AMSOIL has the oils for GM dexos! DPO20
Here is an article from ALS Laboratories in which we give them the credit. Click Here!
A new specification has been released in 2020 for gasoline engines SP. AMSOIL meet this spec & supersedes the SN gen2 specs in 2018 and it absolutely protects 100% against Low Speed Pre-Ignition (LSPI
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