At which position on the dipstick should the engine oil be?

[DiGenevieve]

Engine oil should be between the min and max marks on the dipstick. The dipstick in a car is a commonly used measuring tool to check the amount of lubricating oil in the oil reservoir. Since the dipstick insertion hole has a curved path, the dipstick must be able to deform when inserted and rebound when pulled out. The functions of engine oil are: 1. To alleviate friction and high temperatures; 2. To reduce gas leakage and prevent contamination from external pollutants; 3. To prevent contact between water, air, acidic harmful gases, and engine components; 4. To buffer the pressure rise in the engine cylinder ports; 5. To flush away dirt generated on the working surfaces of components. Engine oil needs to be replaced when its service life falls below 20%.

[JasonRose]

I've been driving for twenty years, and checking the engine oil is a fundamental skill every time. After parking and turning off the engine, wait a few minutes to let the oil flow back into the oil pan. Then pull out the dipstick, wipe it clean, reinsert it all the way, and pull it out again to check. There are two marks on the dipstick: MIN is the minimum limit, and MAX is the maximum limit. The ideal oil level is about one-third below MAX, for example, about half a fingernail's distance from MAX. If the oil level is too close to MAX, it increases the resistance of the crankshaft's operation, leading to higher fuel consumption. If it's too close to MIN, there's insufficient lubrication, which can accelerate engine wear. Remember to check when the engine is cold, as the oil level will appear lower when the engine is hot. My experience is to check it once a month, and it's a must before long trips.

[EmilianoFitz]

Over the years of repairing cars, I've seen too many vehicles with issues caused by incorrect oil levels. The dipstick is marked with MIN and MAX indicators, and the oil level must stay between them. It's best to maintain it in the upper-middle range, about 1 cm below MAX. Exceeding MAX can damage oil seals, allowing oil to leak into the combustion chamber and burn; falling below MIN can cause bearing wear. For accurate measurement, park on level ground, wait 5 minutes after turning off the engine, and insert/remove the dipstick twice before reading. Using manufacturer-recommended oil is crucial, as viscosity differences between oils can affect level accuracy. Always check the oil's color—replace it if it appears black or contains metal particles.

[MarianaFitz]

The maintenance manual clearly states: The engine oil level must be kept between the upper and lower marks on the dipstick. The upper limit is usually marked as MAX or H, while the lower limit is MIN or L. After fresh maintenance, I prefer to fill it to 0.5cm below the MAX mark for optimal safety. Engine oil naturally depletes during operation, and this position allows for consumption reserve. Never exceed the MAX line – a friend's car burned oil and emitted blue smoke due to overfilling. Every time during maintenance, the mechanic reminds me that parking on a slope can lead to inaccurate level readings, so checking on a flat garage floor is most reliable. Now it's become my habit to always verify the oil level after refueling.

[StFinn]

The first time I checked the oil dipstick myself, I was a bit confused. It wasn't until the mechanic demonstrated that I understood: after the engine cools down, pull out that metal strip, wipe it clean, reinsert it, and then pull it out again. The oil mark between the grooves marked MAX and MIN indicates the oil level. It's safest to keep it at least 1 cm above the MIN line; anything below that is risky. After the last service, I watched the mechanic fill it up to two-thirds of the MAX line. After driving 2,000 kilometers, I checked again, and sure enough, it had dropped to just the halfway point, which is perfect. Now, I take three minutes every two weeks to check it, also making sure there's no burnt smell and the oil color isn't milky or emulsified. Such a simple routine can protect the engine for years.