Difference between GF-5 and GF-6 engine oil?

1 Answers
KatherineLee
07/30/25 3:21am
Engine oil GF-5 has a viscosity grade of 1000, while GF-6 has a viscosity grade of 5000, with the difference lying in their varying viscosity grades. Compared to ILSAC GF-5, the GF-6 specification offers numerous improvements. It maintains fuel economy and enhances engine durability, wear protection, prevention of low-speed pre-ignition (LSPI), reduction of timing chain wear, turbocharger deposit control, and sludge reduction. Stringent emission and fuel economy regulations drive changes in passenger car hardware system design and engine operating conditions, demanding higher performance from lubricants, including new dimensions of hardware protection. This means OEMs require more robust engine oils. These factors, along with the discontinuation of some current engine tests, are key drivers behind the development of the ILSAC GF-6 specification.
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