To what level on the dipstick should engine oil be added?
2 Answers
Engine oil should be added to a level above the midpoint on the dipstick. Below are relevant introductions: Introduction to engine oil: Engine oil is engine lubricant, composed of base oil and additives, with base oil being the main component of lubricating oil. Functions of engine oil: As a lubricant: It reduces friction and damage between moving parts, such as between cylinder liners and piston rings, or camshafts. As a coolant: It absorbs heat generated in the combustion chamber and piston crowns, cooling the engine and preventing overheating. As a sealant: It fills the space between piston rings and cylinder liners to prevent pressure leakage. As a cleaner: It prevents pollutants and oxide impurities produced during combustion from adhering to the engine interior, maintaining cleanliness. As a rust inhibitor: It neutralizes acidic substances generated by combustion gases, preventing engine rust and corrosion.
I just changed the engine oil myself, and topping it up really depends on the situation. The most accurate reading is taken by pulling out the dipstick 5 minutes after turning off a warm engine. Generally, it's safe as long as the oil level is in the middle between the MAX and MIN marks on the dipstick, and it's best not to let it drop below the lower third of the MIN mark. Experienced drivers know that having slightly less oil might just mean insufficient lubrication, but overfilling can cause bigger problems—excessive oil pressure can push the piston rings too tightly, leading to poor sealing, possible oil burning with blue smoke, and increased crankshaft rotation resistance, which wastes fuel. Check the dipstick every 5,000 kilometers, especially for older cars that consume oil faster. It's wise to always keep half a liter in the trunk for emergencies. If you find the oil level above the MAX mark right after maintenance, you must remove the excess.
