Your vehicle's engine has hundreds of moving parts in it. These parts cause friction when they rub against each other and the friction, in turn, causes massive amounts of heat in your engine. To protect against all of this friction and heat, we introduce lubricating oil into the engine. The oil has two jobs in the engine. One is to reduce the amount of friction by putting a layer of oil between the moving parts and the other is to help cool the parts of the engine as it circulates through.
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