Preparing for GF-7 Specification

The automotive industry is on the brink of an evolution with the introduction of the new API GF-7 specification. Developed by the International Lubricants Standardization and Approval Committee (ILSAC), this advanced engine oil category is set to have its first license date of March 31, 2025, and promises to redefine performance standards for passenger car motor oils that aim to deliver enhanced fuel economy and a list of benefits for both original equipment manufacturers (OEMs) and consumers.

Key improvements and changes in GF-7

Enhanced fuel economy: The shift towards smaller, more efficient engines is driven by the need for improved fuel economy and reduced emissions without sacrificing performance. These engines often operate under higher pressures and temperatures, which can accelerate wear and tear on engine components. The advancements in oil technology, as encapsulated by the GF-7 specification, has extended limits in the Sequence VIE fuel economy test, which are designed to meet these challenges.

Protection against low-speed pre-ignition (LSPI): One of the critical priorities of the GF-7 specification is the defenses against LSPI, a common issue in turbocharged engines that can lead to severe engine damage. LSPI is a phenomenon where premature combustion of the fuel-air mixture occurs before the spark plug ignites, which can cause knocking and potentially severe engine damage. The GF-7 specification introduces a new Aged Oil LSPI Prevention Test, ensuring that oils can prevent LSPI throughout the oil's drain interval, thus offering enhanced protection against this catastrophic event.

Reduction in piston deposits and timing chain wear: Piston deposits and timing chain wear are two other concerns the GF-7 specification aims to mitigate. Piston deposits can lead to a loss of engine efficiency, increased oil consumption, and higher emissions. Over time, these deposits can also cause engine knocking and reduce the engine's overall lifespan. The GF-7 specification has a tighter Sequence IIIH Piston Cleanliness limit to ensure the oil will provide better protection against such deposits, ensuring that engines maintain optimal performance over a longer period. Similarly, timing chain wear can result in reduced engine efficiency and potential engine failure. The GF-7 specification includes a reduced limit on the Sequence X Chain Wear, aiming to extend the life of these critical components.

Implications for customers and oil manufacturers

For consumers, the transition to GF-7 means not only better vehicle performance but also potential cost savings. Improved fuel economy translates to fewer trips to the gas station, and the superior protection offered by GF-7 oils can extend engine life, thereby reducing the frequency and cost of repairs.

As the effective first license date for the GF-7 specification approaches, there will be a transition period where both GF-6 and GF-7 oils will be available to allow for a smooth changeover.  Chevron has been working diligently to ensure our entire Chevron Havoline^® and Chevron Supreme motor oil product lines are ready for GF-7. These preparations underscore Chevron’s commitment to meeting the new industry standards and providing consumers with the highest quality and most reliable products.