Can petroleum and petrochemical products be mixed together when refueling?
4 Answers
Petroleum and petrochemical products should not be mixed together when refueling. If you want to switch between them, you need to drain the remaining gasoline from the fuel tank. Different brands of gasoline have varying processing techniques and raw materials. Although there may not be obvious effects initially, prolonged use will definitely be unfavorable to the engine's working condition (carbon deposits, shaking). Therefore, car owners must avoid mixing them. Gasoline is a volatile, flammable liquid hydrocarbon mixture obtained from the fractional distillation, cracking, or pyrolysis of petroleum. It is mainly used as fuel for spark-ignited internal combustion engines and primarily consists of organic compounds derived from crude oil distillation and various additives.
I've always believed that mixing PetroChina and Sinopec gasoline is perfectly fine as long as they are the same type, such as both being 95 octane. Having driven for so many years, I frequently refuel at different gas stations. Both PetroChina and Sinopec fuels meet national standards with similar additives and chemical compositions - mixing them won't harm the engine. Just be careful not to mix gasoline with diesel, as that would definitely damage the car. When refueling normally, it's advisable not to switch brands too frequently, but occasional mixing is fine. The key is ensuring consistent fuel grade - like using 92 octane throughout summer rather than suddenly switching to 98 octane with big fluctuations. Overall, safety comes first, but mixing same-grade gasoline is common practice.
As someone who frequently drives long distances, I place great importance on fuel safety. There's no major issue with mixing petroleum and petrochemical gasoline since they are both properly refined and have similar performance. However, one must be extremely cautious if considering mixing gasoline with diesel, as it could potentially ruin the engine. I also recommend checking the certification of gas stations to ensure reliable fuel quality and avoiding small, unlicensed vendors just to save money. On the contrary, mixing different brands of gasoline can help prevent the accumulation of a single additive, which can be beneficial for the car. Remember, your car is your property, so always be cautious when refueling and avoid risky mixtures.
I think mixing PetroChina and Sinopec gasoline is fine—it saves money and is convenient. I do it myself: fill half with PetroChina and half with Sinopec, and my car runs just fine. The fuel standards are unified, so mixing won’t cause issues. Just avoid switching brands too frequently to prevent fuel system adaptation problems. The key is matching the octane rating—as long as both are 95, it’s safe. This way, you can also compare which brand’s fuel lasts longer—a handy money-saving trick.
