What is the normal oil temperature for cars in summer?
3 Answers
In summer, an oil temperature of 90 degrees Celsius is considered normal for cars. Engine oil operating temperature: The normal operating temperature of engine oil is around 90 degrees Celsius. However, in the areas it serves, particularly the combustion chamber of the engine, temperatures can exceed 200 degrees Celsius. Engine oil operating temperature range: The normal operating temperature range for engine oil is generally 70-90 degrees Celsius, with some localized areas being higher. It typically doesn't exceed the coolant temperature. Additionally, at higher speeds, the temperature may rise to around 100-110 degrees Celsius. However, if there's a consistent trend of temperatures exceeding 120 degrees, an inspection should be performed.
As a veteran driver who frequently takes long-distance trips, I pay special attention to oil temperature. During high-speed driving in summer, normal oil temperature typically fluctuates between 90 and 110 degrees Celsius, while idling may be about 10 degrees lower. The most straightforward way to monitor it is by glancing at the dashboard—if the needle stays in the middle range, everything is fine. I remember once driving to Hainan, running continuously for four hours in 38-degree heat, and when the oil temperature rose to 115 degrees, I pulled over to rest to avoid irreversible damage to the engine. I make it a habit to check the coolant and radiator every three months, especially for older car models. If the temperature exceeds 120 degrees, you'll clearly smell a burnt odor—that's when it's wise to stop immediately and let the engine cool down.
I've noticed many beginners overlook the importance of oil temperature. In summer driving, the ideal oil temperature range is actually between 90°C and 105°C. For example, when my car is idling at traffic lights with the AC on in urban areas, the oil temperature rarely exceeds 100°C. However, it's normal for it to reach 115°C when climbing mountain roads at noon. I once heard a technician at a repair shop say that for every 10°C increase in oil temperature, the oil's lifespan is halved. Therefore, it's recommended to take a 20-minute break after driving for more than two hours in hot weather to let the cooling system recover. Another useful tip: switching to high-temperature resistant oil like 5W-40 in summer can provide an additional safety margin of about 15°C.
