api oil ratings

[SAndreasen]

API ratings (diesel): CH-4, CG-4, CF-4, CF . anybody know what these particular api ratings mean? thay come from john deeres synthetic 0w 40 oil just wondering what thaey mean thanks?

 

[Bob Beauchaine]

The "C" stands for Commercial service or if you prefer Compression ignition. The second letter refers to the latest API rating "H" being more current than "G" etc.



Bob

 

[amsoilman]

What Bob said, but I'll add another thing. The latest "C" rating is CJ-4, which is used in the engine built AFTER 1-1-2007. CI-4 was before that. BTW, the -4 means 4 cycle engines.



Wayne

 

[SAndreasen]

thanks for the replies i had an idea what they meant but wasnt sure