what is grease they use in gears and stuff? Why does it need to be replaced occasionally?
In: Engineering
When they take oil and make gasoline, many other substances come from the process as well. The lighter ones are gases and fine oils. The heavier ones are diesel, grease, bunker oil, and other things.
People have come up uses for virtually all of the fractions. Bunker oil is the sludge at the bottom, and the use they found is to burn it at sea for ship’s fuel.
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