How to Read an Oil Dipstick?
3 Answers
The method for reading an oil dipstick is as follows: 1. On the main scale, read the graduation to the left of the zero line on the auxiliary scale, which represents the integer part of the final reading; 2. There are two notches at the front end of the dipstick—the foremost notch indicates the low oil level, and the rear notch indicates the high oil level; 3. After pulling out the dipstick, if the oil mark is between the two notches, it means the oil level is normal. If it is below or above the notches, the oil level needs adjustment. The oil dipstick is a commonly used measuring tool to check the lubricant level in the oil reservoir. Due to the curved path of the dipstick insertion hole, the dipstick must be able to deform when inserted and rebound to its original shape when pulled out.
When I first bought my car, I didn't know how to read the oil dipstick either. Later, my neighbor uncle taught me the trick. First, you need to park on level ground and turn off the engine, then wait five minutes for the oil to flow back into the oil pan. Next, open the hood and find the metal rod with the yellow plastic handle—that's the dipstick. Pinch the handle and pull it straight out, wipe the metal rod clean with a tissue, and then insert it back all the way. Finally, slowly pull it out and observe the oil level: there are two grooves or raised marks on the rod, and the oil should be between the upper and lower marks to be normal. If the oil level is below the lower mark, you need to add oil quickly; if it's above the upper mark, it can damage the engine seals. Remember to check it once a month, and take a look at the oil color—if it's as black as cola, it's time to change it.
During a maintenance visit, I asked the technician about reading the oil dipstick. He wiped his hands and chatted with me. You must ensure the car is parked, turned off, and left for ten minutes before checking, allowing the engine oil to fully settle. The dipstick is usually located near the engine with a noticeable yellow handle—pull it straight without tilting. Here’s the key: the first time you pull out the dipstick, wipe it thoroughly with a non-woven cloth, as residual oil can affect accuracy. Reinsert it fully, then pull it out again and observe the oil film boundary on the metal rod—typically between the LOW and FULL marks. He reminded me that measuring when the engine is cold is most accurate, as slopes can cause a half-centimeter error. If the oil level is too low, add half a liter and recheck; if it’s too high, drain some oil to prevent engine seal leaks. Also, be cautious if the oil appears milky or thin, as it may indicate water contamination.
