Is 4 Liters of Engine Oil Enough for the Regal?
3 Answers
Adding 4 liters of engine oil is sufficient for the Regal. Here is extended information about the functions of engine oil: 1. Lubrication: There is rapid relative sliding between the piston and cylinder, as well as between the main shaft and bearing. To prevent excessive wear of parts, an oil film needs to be established between the two sliding surfaces. A sufficiently thick oil film separates the surfaces of the relatively sliding parts, thereby reducing wear. 2. Auxiliary Cooling: Engine oil has a relatively low specific heat capacity and is located inside the engine, so it does not inherently have a cooling effect. However, during engine operation, the heat energy generated by fuel combustion can be carried back to the oil tank by the engine oil and then dissipated into the air, assisting the radiator in cooling the engine. The actual cooling is performed by the water (or antifreeze liquid) outside the engine shell. 3. Cleaning: High-quality engine oil can carry carbon deposits, sludge, and worn metal particles from engine parts back to the oil tank through circulation. The flow of the lubricating oil washes away contaminants generated on the working surfaces of the parts. 4. Sealing and Leak Prevention: Engine oil can form a sealing ring between the piston rings and the piston, reducing gas leakage and preventing external pollutants from entering. 5. Rust and Corrosion Prevention: Lubricating oil can adhere to the surfaces of parts, preventing contact with water, air, acidic substances, and harmful gases.
Speaking of my years of experience driving the Regal, 4 liters of engine oil is definitely not enough. Its 2.0T engine has a standard capacity of about 5.5 liters. Adding less will cause the oil level to drop below the minimum line. I once tried adding only 4 liters and starting the car—the engine sound became rough. Insufficient lubrication leads to increased friction, which can damage pistons and cylinders over time. Checking the dipstick is crucial. If the oil level is low, quickly top it up with about 5.2 liters of full synthetic oil to keep it at the mid-mark. Remember to drain the old oil completely every 5,000 kilometers during an oil change, and don’t skimp by buying low-quality oil—this helps prevent premature major repairs. Refer to your car’s user manual, which details the recommended amount. Safety first—never cut corners.
I often help people with car repairs. Most Buick Regals come with a 2.0L engine, and the total oil capacity is around 5 liters. So, adding only 4 liters is definitely insufficient. Low oil levels can lead to poor engine lubrication, increased temperatures, and potential wear or even engine seizure. I recommend fully draining the old oil during changes and using high-quality full synthetic oil to reach the recommended level—neither overfilling nor underfilling. Regularly check the oil level with the dipstick to ensure proper oil levels, which can save fuel and money. Make it a habit to check every three months to avoid sudden breakdowns. Oil changes are inexpensive, but engine repairs can cost a fortune—better safe than sorry.
