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Discussion Starter · #1 · (Edited)
API rated CJ-4 Diesel Engine Oil expected to be phased out 1Q-2017 (one year from now):

Beyond CJ-4: Introducing PC-11, the New HDDEO Performance Category | HDDEO

The current name "PC-11" will ultimately be changed to CK-4 for backward compatible oil and FA-4 will be a new category for modern diesel engines.

Shell Rotella fans can read what Shell has to say here:
What Makes Our Engine Oil Different - PC-11 Development

So who plans to stock up on their favorite CJ-4 Oil when the Retailers offer discount prices to clear out old inventory ?

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