Will adding National V diesel to National VI diesel vehicles have any impact?
2 Answers
Adding National V diesel to National VI diesel vehicles will have an impact and cause certain damage to the engine. The National VI emission standards are more than 50% stricter than National V. Diesel is a light petroleum product, mainly composed of diesel fractions produced through processes such as crude oil distillation, catalytic cracking, thermal cracking, hydrocracking, and petroleum coking. It can also be obtained from shale oil processing and coal liquefaction. Methods for storing and using diesel: 1. Prevent the mixing of water and mechanical impurities; 2. It is strictly forbidden to mix with gasoline for lighting or as fuel for kerosene stoves; 3. Diesel must be precipitated and filtered to remove impurities and water before use; 4. Strictly avoid exposure to sunlight and open flame heating, and try to store it at lower temperatures. In winter, diesel can be preheated as necessary before use.
Occasionally using National V diesel in a National VI diesel vehicle might not cause immediate issues, but I’ve encountered problems with long-term use. Once after refueling with low-quality diesel, the vehicle’s exhaust filtration system started clogging, triggering the engine warning light and significantly reducing power. The mechanic explained that National VI vehicles are designed with precision, and the higher sulfur content in National V diesel can cause carbon buildup, damaging after-treatment components. I ended up spending around a thousand yuan on cleaning—a lesson learned. Now, I only refuel with National VI diesel at reputable gas stations, ensuring the labels match. If you accidentally fill up with the wrong diesel, it’s best to drive to a repair shop immediately for inspection rather than waiting for a breakdown. Poor-quality diesel can also lead to excessive emissions, harming the environment. To keep your vehicle running well long-term, it’s safer to develop good refueling habits.
