What are the effects of gasoline in high-temperature environments?
3 Answers
No impact. When the internal working temperature of the engine rises, many car owners believe that they need to switch to higher-grade engine oil to better reduce oxidation and deterioration under high temperatures and avoid excessive wear. However, this is actually a misconception. The methods for selecting the right engine oil are as follows: 1. Choose SN-grade engine oil: Higher-grade oils contain more additives to protect the engine, with SN currently being the highest grade and offering the best performance. 2. Select the appropriate oil viscosity: If the viscosity is too high, the crankshaft will require more force to rotate, reducing engine efficiency and increasing fuel consumption. If the viscosity is too low, while it improves fluidity, it can make the oil too thin when the engine is hot, leading to oil leaks or burning oil.
As someone who enjoys tinkering with cars, gasoline can cause quite a few problems under high temperatures. Heat accelerates the evaporation rate of gasoline, especially during hot summers when parked under direct sunlight. This often leads to vapor lock, making the engine difficult to start or even causing it to stall—a particularly noticeable issue in older vehicles. Additionally, increased gasoline volatility disrupts the air-fuel ratio, resulting in weaker engine performance, a sluggish driving feel, and significantly higher fuel consumption, which is just a waste of money. I recommend using high-octane premium gasoline and avoiding refueling during the midday heat. Opt for early morning or evening when fuel temperatures are lower and density is higher. Regularly checking the fuel system and cooling system can also help reduce evaporation issues. Avoid leaving your car exposed to direct sunlight for extended periods; parking in a shaded area is key to preventing these problems from ruining your driving experience.
Having driven for many years, I deeply understand the troubles caused by high temperatures on gasoline. In hot weather, gasoline evaporates particularly easily, especially when the engine is hot. It's really frustrating when the car takes forever to start or suddenly stalls. The evaporated fuel not only wastes money but can also increase fuel consumption by around 20%. Safety-wise, increased tank pressure may lead to leaks or even fire hazards. I make it a habit to park in shaded areas to reduce direct sunlight exposure and try to refuel during cooler morning or evening hours, avoiding gas pumps with high fuel temperatures. Adding anti-knock gasoline or evaporation-resistant additives can help stabilize fuel performance. Paying attention to tire pressure and air conditioning usage also indirectly affects fuel efficiency.
