What does it mean when the Accord's oillife shows a negative number?

[LaPreston]

Oillife represents the remaining life of the engine oil. Typically, there will be a number following this indicator, indicating the specific life of the oil. When it drops to 20%-30%, the oil should be replaced promptly. Additional information is as follows: 1. Short-term driving is possible when negative: When Honda's oillife turns negative, the car can still be driven, but only for a short period, otherwise it may damage the engine. When oillife becomes negative, it proves that the lubrication capability of the oil has significantly decreased, and its lubrication effect on the engine has greatly weakened. 2. Calculation of oillife: It is a result calculated by the vehicle's computer based on parameters such as the vehicle's usage time, mileage, engine speed, etc. To protect the engine, the value calculated by the computer is usually a conservative estimate.

[StBeau]

I heard quite a few people mention this during casual chats at the repair shop last time. It's actually quite common for the Accord's oil life monitor to display a negative value—simply put, it means the oil needs changing but the owner forgot to do it. Systems like OilLife calculate how much longer the oil can last based on mileage and driving habits. When the percentage drops to zero and keeps going, it turns negative, indicating that the maintenance interval has been significantly exceeded, and the oil's performance may have degraded severely. Worse still, I've seen some cars where this is accompanied by false alarms from sensor malfunctions, like the system incorrectly showing a negative value after highway driving over bumps. Quickly check the dipstick to see if the oil is black or has contaminants—don't rush to reset the display; first, make sure there's no risk of engine damage. If in doubt, take it to the dealership for a computer diagnosis to prevent minor issues from turning into major ones. Get into the habit of manually checking the oil level every 5,000 km—don’t rely solely on electronic alerts.