The phrase refers to the recommended intervals or circumstances for performing preventative maintenance on a vehicle’s engine. This maintenance typically involves replacing components like spark plugs, air filters, fuel filters, and inspecting/adjusting ignition timing to ensure optimal engine performance. As an example, manufacturers may suggest this service be performed every 30,000 miles or every two years, whichever comes first.
Regular engine maintenance is crucial for maintaining fuel efficiency, reducing emissions, and preventing more costly repairs down the line. Historically, these services were more frequent due to simpler engine designs and less durable components. Modern vehicles, with their advanced technology and improved parts, generally require less frequent intervention. The benefits include extended engine life, consistent performance, and lower overall operating costs.
