Complex sentence: Over time, Duratec was expanded to become an omnibus name for Ford's gasoline engines unrelated to the Mondeo V6, such as the Ford Zeta engine and Ford's variant of the Mazda L engine.
Split into simpler sentences: Over time, Duratec was expanded to become an omnibus name for Ford's gasoline engines unrelated to the Mondeo V6, such as the Ford Zeta engine. This is Ford's variant of the Mazda L engine.