Should You Change Engine Oil Before or After a Long-Distance Drive?
2 Answers
If your car is close to the recommended mileage for an oil change, it's best to change the oil before a long-distance drive; this can improve the car's performance. Generally, changing the oil every 3,000 kilometers is a more demanding practice, but under normal circumstances, it's also acceptable to change the oil at the first maintenance interval of 7,500 kilometers. Engine Oil: Engine oil, also known as motor lubricant, serves multiple functions such as lubricating and reducing friction, assisting in cooling, sealing against leaks, preventing rust and corrosion, and cushioning shocks. Often referred to as the 'blood' of a car, engine oil consists of base oil and additives. The base oil is the primary component of the lubricant, determining its fundamental properties, while the additives compensate for and enhance the base oil's performance, providing additional benefits and making them a crucial part of the lubricant. Benefits of Changing Engine Oil: Cooling: Engine oil carries heat back to the oil pan and dissipates it into the air, helping the radiator cool the engine. Sealing: Oil forms a seal between the piston rings and pistons, reducing gas leakage and preventing contaminants from entering. Cleaning: Engine oil carries carbon deposits and metal wear particles back to the oil pan through circulation, flushing away debris from the engine components. Lubrication: Oil ensures smooth relative sliding between pistons and cylinders, as well as between the crankshaft and bearings, preventing excessive wear. Oil Change Intervals: Mineral oil should be changed every 5,000 kilometers or six months, semi-synthetic oil every 7,500 kilometers or nine months, and full synthetic oil every 10,000 kilometers or one year.
I personally think it's more sensible to change the oil before hitting the highway. On the expressway, the engine has to run at full speed for extended periods, causing oil temperature to rise rapidly. Old oil provides poorer lubrication, increases wear, and may even lead to overheating. Fresh oil with the right viscosity offers better protection, making the engine run smoother and quieter. Don't wait until after the highway trip to change the oil—by then, accumulated impurities in the old oil can hinder cleaning. If you don't drive much daily, check the odometer and change the oil early when nearing the maintenance interval for peace of mind. Checking the car's condition before a highway trip is a habit I stick to—ensuring proper tire pressure, responsive brakes, and even inspecting the AC filter for safety first.
