What are the precautions for diesel vehicles entering Tibet?
3 Answers
Precautions for diesel vehicles entering Tibet are as follows: 1. Avoid December to March: The winter temperature in Tibet is relatively low, and diesel engines are harder to start in cold weather. If you must go, switch to low-temperature engine oil and diesel with a rating of -20 or -35. 2. Try to choose Sinopec gas stations: Diesel vehicles are most afraid of poor-quality diesel. The fuel quality at small gas stations in Tibet really cannot be guaranteed. 3. Get a pre-trip inspection: At a professional auto shop, give your car a comprehensive "check-up," and it's important to switch to suitable engine oil based on the temperature. When driving on poor dirt roads for long periods, frequently remove the air filter to blow out dust, as "breathing difficulties" can affect the vehicle's power.
I gained a lot of experience from my last trip to Tibet in a diesel vehicle. Due to the low atmospheric pressure in high-altitude areas, the engine's air intake is insufficient, resulting in about a 20% power reduction compared to plains. Don't hesitate to downshift when climbing slopes. The most troublesome issue is cold starts – it's advisable to use -20 or -35 grade diesel and carry some anti-gel additives to prevent fuel line freezing. Try to refuel at official Sinopec or PetroChina gas stations, as fuel quality varies in remote areas of Tibet. Bringing a few bottles of fuel cleaner will definitely come in handy. For vehicle condition, pay special attention to the turbocharging system – high-altitude conditions place greater demands on turbochargers. Brake pads should also be replaced in advance due to heavy braking loads on long downhill sections. Carry snow chains, oxygen tanks, and altitude sickness medication, as weather changes rapidly in Tibetan regions – better safe than sorry. Before departure, clean the fuel-water separator thoroughly, as high-altitude diesel may have higher water content, and you don't want the filter to clog midway.
When driving a diesel vehicle into Tibet, special attention must be paid to the fuel system. Many gas stations in Tibet only offer No. 0 diesel, which is prone to waxing and clogging the fuel filter in cold weather. Installing a fuel heating system or carrying sufficient diesel anti-gel additives before departure is crucial. The turbocharger bears a heavy load at high altitudes, so it's essential to check the turbo blade clearance and lubrication lines in advance. Remember to replace the air filter with a high-altitude-specific model, as thin air requires more efficient filtration. Fill up the fuel tank whenever you encounter a gas station, as the next one might be 300-400 kilometers away. Replace the antifreeze with a -45°C rated one, as nighttime temperatures often drop below -20°C. Tire pressure adjustment is critical due to the significant temperature differences between day and night at high altitudes; reduce tire pressure by 0.2 bar compared to plains when setting off in the morning. Carry an electric air pump for convenient adjustments on the road.
