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
You’ll see the symbol on bottles that meet GF-6 standards. These oils focus heavily on fuel economy and emission system protection. ACEA (European Automobile Manufacturers' Association): engine oil specs.7z
Common in European cars (BMW, VW, Mercedes). Ratings like or C3 indicate specific requirements for high-performance engines or those with advanced exhaust filters. 3. Oil Types: Base Stocks engine oil specs.7z