What is the normal range for the oil dipstick?

[ArcherAnn]

Oil dipstick readings between the lower and upper marks are considered normal. Typically, an oil dipstick has two marked lines, and during routine vehicle checks, the oil level should be between these two lines. If the oil level is below or close to the lower mark, oil should be added. Below are the functions of engine oil: 1. Friction reduction: A sufficiently thick oil film separates the surfaces of sliding parts, thereby reducing wear. 2. Sealing: Engine oil can form a seal between the piston rings and pistons, reducing gas leakage and preventing contaminants from entering. 3. Rust prevention: Lubricating oil adheres to part surfaces, preventing contact with water, air, acidic substances, and harmful gases. 4. Cushioning: When cylinder pressure rises sharply, suddenly increasing the load on pistons, piston rings, connecting rods, and crankshaft bearings, the lubricated transmission of this load through the bearings helps cushion the impact. 5. Cleaning: High-quality engine oil can carry carbon deposits, sludge, and worn metal particles from engine parts back to the oil pan through circulation, flushing away contaminants generated on the working surfaces of the parts.