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.
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
If your car has over 75,000 miles, look for "High Mileage" versions which contain seal conditioners to prevent leaks. gasoline differences? engine oil specs.7z
This represents the oil's resistance to flow at operating temperature (212°F / 100°C). A higher number means a "thicker" oil film, which provides more protection for hard-working or older engines. 2. Performance Categories (The Letters)
Refined crude oil. Good for basic, older engines with frequent change intervals. Common in European cars (BMW, VW, Mercedes)
These ratings tell you if the oil meets the latest technological standards for your engine type.
A mix of both. It offers better protection than conventional but at a lower price point than full synthetic. 4. OEM Approvals (Manufacturer Specs) Oil Types: Base Stocks If your car has
The "W" stands for Winter. This number indicates how well the oil flows at cold temperatures. A lower number (0W or 5W) means the oil stays thinner in the cold, helping your engine start more easily in winter.