The current highest standard for gasoline engines (introduced in 2020). It’s designed to protect against "low-speed pre-ignition" (LSPI) in modern turbocharged engines. CK-4 / FA-4: Current standards for diesel engines.
Refined crude oil. Good for basic, older engines with frequent change intervals. engine oil specs.7z
Always prioritize what the manufacturer recommends. Using the wrong viscosity can lead to poor fuel economy or engine wear. engine oil specs.7z