What are the methods and standards for checking engine oil?

[AdalynnMarie]

Here is an introduction to the standard method for checking engine oil: Determining the oil level: Park the vehicle on a relatively level and flat road surface; After parking for 10 minutes, pull out the dipstick and observe the position of the oil between the upper and lower marks on the dipstick to determine whether the oil in the oil pan needs to be added. Remember not to pull out the dipstick immediately after parking to check the oil level in the oil pan, as the result at this time cannot accurately reflect the actual oil level in the oil pan. Do not overfill: If the oil level in the oil pan is already below the lower mark on the dipstick, it is necessary to add oil in time. Unscrew the oil filler cap and add an appropriate amount of the same brand and grade of oil as that in the oil pan. Wait for 10 minutes, then check whether the added oil meets the requirements. The oil level should be between the upper and middle marks on the dipstick. Remember not to add too much oil. If the oil level exceeds the upper mark on the dipstick, the engine will expel oil from the breather and produce blue smoke from the exhaust pipe when operating under this condition.