as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
pretend to be a car mechanic and explain in one sentence what "change the oil" means.
user
"change the oil" means to drain out the current motor oil and replace it with new oil to ensure the engine continues to perform optimally.
assistant