Will Not Using Urea Increase Fuel Consumption?

[SanCaleb]

If urea is not used, fuel consumption may increase slightly, and there may also be a decrease in power. When a truck does not use urea, the nitrogen oxides (NOx) in the exhaust cannot be catalytically reduced, so the emitted exhaust will certainly be harmful to the ecological environment. Relevant information about trucks is as follows: 1. Common types of box trucks include: single-row box micro trucks, soft-top box trucks, side-opening box medium trucks, and container-type large trucks. By brand classification: Dongfeng box trucks, Jiefang box trucks, Isuzu box trucks, Jianghuai box trucks, Jiangling box trucks, Foton box trucks. 2. By shape classification: single-axle box trucks, double-axle box trucks, flat-nose box trucks, pointed-nose box trucks. By purpose classification: warehouse-grid transport vehicles, box trucks.

[MariaFitz]

I've been driving a diesel pickup for over ten years. Last time, my friend forgot to add urea, and the fuel consumption shot up quite a bit. So, what does this SCR system do? It sprays urea into the exhaust to reduce pollution emissions. If the urea supply is cut off or the system malfunctions, the vehicle's computer immediately detects the abnormality and automatically limits the engine's torque and power—basically making the car feel sluggish, entering what's called 'limp mode.' At this point, if I try to step on the gas to speed up, I have to press harder, or the car won't move. The result is that the more I press the accelerator, the more fuel it consumes. Not only does fuel consumption increase, but driving like this for a long time can also damage the catalytic converter, leading to costly repairs. So now I've developed a habit: every time I refuel, I check the urea level—roughly one small bottle of urea per tank of fuel—to avoid big expenses later. If the dashboard warning light comes on, don't delay—go refill or check for faults right away.

[IkerAnn]

As a diesel vehicle owner, I encountered a urea issue last year, which significantly increased my fuel consumption. Without urea in the SCR system, the emission control system essentially goes on strike, and the engine automatically limits torque to protect itself, preventing excessive exhaust temperatures from damaging components. At that point, even overtaking on the highway became difficult, forcing me to press the accelerator more frequently and harder, burning extra fuel with each push. Actual measurements showed my usual fuel consumption was 8 liters per 100 kilometers, but it rose to over 10 when the problem occurred. The repair shop warned this could trigger other issues, like nozzle clogging. While the repair costs are minor, the safety risks are the real concern. Now, I check my urea levels monthly to ensure the system operates normally, keeping my fuel consumption stable. Don’t underestimate this issue—delaying action could cost you more in fuel than you save.

[DelCarmen]

My diesel car's SCR system had a malfunction, and the fuel consumption immediately soared when no urea was added. The principle is simple: when the car detects that urea is not being injected or is insufficient, it limits the output power to prevent increased emissions. As a result, the engine's power decreases, and I naturally have to give more fuel to maintain speed while driving. This not only increases fuel consumption but may also put the system into a protective state. Prolonged operation in this condition can damage the after-treatment device. During a visit to the repair shop, it was recommended to promptly replenish urea or check the sensors to avoid fuel consumption issues.

[PaigeRose]

When I was a car owner, I tried not using urea, and during that time, the fuel consumption increased significantly. The SCR system relies on urea solution to convert harmful gases. Once it's lacking, the engine enters limp mode and becomes sluggish. When driving normally, I had to press the accelerator harder to start and accelerate, and each deeper press consumed more fuel. The maintenance staff mentioned that this situation could also lead to excessive emissions and fines, making it even more cost-ineffective in the long run. Now, I regularly refill the urea in my car, keeping the level above half a tank, and the fuel consumption remains stable and normal. Remember not to overlook this, as it directly affects fuel costs and environmental protection.