
For a sedan, the appropriate amount of engine oil is between the upper and lower marks on the dipstick. Adding too much oil can cause the engine to burn oil or increase operational resistance, while adding too little can lead to inadequate lubrication of the internal components, accelerating friction and wear. Engine oil, also known as engine lubricant, plays vital roles in the engine, including lubrication, cleaning, cooling, sealing, reducing wear, damping vibrations, and preventing rust and corrosion. It is often referred to as the 'blood' of the car. Currently, there are three types of engine oil available on the market: conventional mineral oil, semi-synthetic oil, and full synthetic oil.

When it comes to engine oil quantity, I'll base it on my usual driving habits. Most sedan engines require between 3 to 5 liters, but the exact amount depends on the vehicle model and manual. Take my car for example - it's a regular family sedan with a 1.6L engine, and the manual specifies about 4.2 liters. Before adding oil, it's best to have the car cooled down and parked on level ground. Pull out the dipstick, wipe it clean, reinsert it, then pull it out again to check - the oil level should be perfectly between the MIN and MAX marks. Adding too much oil increases pressure and can damage seals, often resulting in white smoke; too little oil leads to insufficient lubrication causing part wear, and may cause abnormal noises and overheating. I recommend checking during every maintenance service - don't just pour in the whole bottle at once, add gradually while checking for safety. If doing it yourself, prepare a funnel to prevent spills and save some repair costs.

Adding engine oil should not be done carelessly to save time. I learned my lesson the hard way: once I hastily added too much, and the excess oil foamed up and damaged the spark plugs, costing hundreds to repair. Generally, cars require between 3 to 5 liters of oil, depending on the engine model—small cars might only need around 3 liters. Always check the oil level with the dipstick first. If it's low, add about half a liter, wait five minutes, and check again. Maintaining the oil at the optimal level extends engine life and avoids unnecessary fuel consumption. Daily temperature changes also affect oil levels; in summer, keeping it slightly higher helps prevent overheating. Always choose certified oil and avoid mixing brands—cutting corners may save money but offers poor protection.

Engine oil level is crucial for engine safety. Too little oil leads to poor lubrication and component wear; too much causes foaming, losing lubrication and damaging gaskets. For accurate measurement, park on level ground, check the dipstick when cold, and maintain the level in the middle zone. Cars typically require 3 to 5 liters; consult the manual or a professional for specifics. Don't overlook oil quality—regular changes prevent impurity buildup and engine failure. I monitor this daily to avoid unexpected breakdowns.


