Key Technical Demands

The following reflects performance areas under active development within PC-12 as of 2025. Specific test methods and numerical limits are subject to revision. Confirm all details against current published API and ASTM documentation.

Proposed Performance Requirements

Performance Area	Anticipated Test	Direction vs API CK-4	Rationale
Oxidation Resistance	ASTM IIIJP / IIIK (proposed)	Significantly tightened	Low-NOx combustion increases oxidative stress
Soot Handling / Dispersancy	Mack T-12/T-13 (under review)	Enhanced requirement	Higher EGR rates increase soot loading
Wear protection	CAT C13 / Cummins ISB	Tightened	Protection required at extended drains
Aeration Control	Proposed aeration test	New or enhanced limit	Low-NOx calibrations alter crankcase dynamics
Viscosity Stability	Shear stability tests	Enhanced requirement	Extended drain requires sustained viscometric performance
Aftertreatment Compatibility	Phosphorus / Sulfated Ash	Maintained (or tightened)	DPF and SCR system protection
Corrosion Protection	Proposed corrosion test	Enhanced	Increased acid generation from low-NOx combustion

API PC-12