What is the difference between Mobil 5w30 and 0w40 engine oil?
2 Answers
The differences between Mobil 5w30 and 0w40 engine oil are as follows: 1. Difference between 5W and 0W: This indicates the oil's fluidity at low temperatures. 5W ensures good fluidity at -30°C, while 0W ensures good fluidity at -35°C. 2. Difference between 30 and 40: This represents the oil's viscosity at high temperatures, i.e., the thickness of the oil when the engine is operating normally. 3. Semi-synthetic vs. fully synthetic: It is recommended to choose at least semi-synthetic oil or higher. 5W is available in both semi-synthetic and fully synthetic variants, while 0W is generally only available as fully synthetic.
As someone who has driven for a long time, I think there are quite a few differences between Mobil 5W30 and 0W40 engine oils. Let's start with the numbers: The '5' in 5W30 means it flows better at low temperatures, making it suitable for areas with moderate temperatures. For example, in the city where I live where winters aren't too cold, it saves fuel and runs smoothly. But the '0' in 0W40 means even better low-temperature flow, allowing easy starts even below zero, making it especially suitable for cold northern regions. At high temperatures, the '40' viscosity is higher, providing stronger engine protection and preventing wear, though it might increase fuel consumption slightly. I've tried both types myself and found that 0W40 makes the engine quieter during long-distance high-temperature driving, though it's a bit more expensive. The key is to check your car's manual for recommendations—don't use the wrong type, as it could affect engine lifespan.
