(from a lubrizol article)
Creating Performance Packages
For passenger car motor oils, components are not sold individually. Lubrizol formulates them into performance packages to meet various market needs. For instance, in North America virtually all passenger cars have gasoline engines. In Europe, over 40% of passenger cars have diesel engines.
In North America, passenger car motor oils are engineered to meet the recommended OEM oil drain intervals of between 3,000 and 7,500 miles depending upon the type of driving=97severe or normal. In Europe, oils are engineered for longer drain intervals, often exceeding 20,000 miles. The components needed to meet these needs are usually quite similar, but the way we formulate them into a performance package can be quite different.
Our formulated performance packages are then supplied to oil marketers, who blend them with base oil, viscosity modifier, and pour point depressant to create the finished motor oil.
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