Is it better to use 5w30 or 5w40 for the Edge?

[StLucille]

The Edge performs better with 5w30. The difference between 5W30 and 0W40 engine oils lies in their high and low-temperature performance. 0W40 has better low-temperature fluidity, making it suitable for colder environments, while its higher high-temperature viscosity provides better high-temperature protection but also increases fuel consumption. Here is some information about engine oil: 1. Engine oil: Engine oil, also known as engine lubricant (English name: Engine oil), with a density of approximately 0.91×10³ (kg/m³), serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. 2. Main characteristics: The engine is the heart of a car, containing many metal surfaces that move against each other. These components operate at high speeds, in harsh environments, and can reach temperatures of 400°C to 600°C. Advanced technology can convert natural gas into crystal-clean fully synthetic base oil, to which unique power cleaning technology is added, creating lubricants with superior cleaning and protective performance.

[VonAthena]

I've always lived in the north where winters are extremely cold, and the oil must flow quickly when starting the car. I've been driving the Ford Edge for over three years, and 5W-30 is noticeably thinner than 5W-40 in low temperatures. On mornings when it's minus twenty degrees, the engine starts without any difficulty, and lubrication is much smoother after startup. The difference in summer is minimal, but in winter, 5W-40 is slightly thicker, especially for older engines, which can feel strained. Fuel efficiency is also good, with 5W-30 offering slightly better mileage. Remember to change the oil according to the season, and don't skimp by switching back and forth to save money. Always check the oil dipstick and make sure not to use counterfeit or low-quality oil, as it can damage the engine.

[LaSienna]

As an owner who enjoys driving fast, the Edge has pretty strong acceleration. When the engine temperature rises, it's important to choose the right oil. 5W-40 with higher viscosity offers better protection during high-speed driving or climbing, preventing excessive piston wear. Although 5W-30 is more fuel-efficient, its oil film is too thin under aggressive driving conditions, which may harm the engine in the long run. From my experience, 5W-30 is sufficient for city commuting, but if you frequently drive long distances or on mountainous roads, switching to 5W-40 provides more peace of mind. Also, consider your driving habits—avoid stomping on the gas pedal too often. For regular maintenance, consult a mechanic who understands your specific vehicle condition.

[Juliana]

As the vehicle ages, the engine gaps increase. My Edge started to have a slight oil seal leak after running 80,000 kilometers. At this point, 5W-40 is better—its higher viscosity can fill the gaps, providing more stable lubrication and reducing noise. The factory recommendation for a new Edge is 5W-30, but switching to 5W-40 after prolonged use can extend its lifespan. Don’t forget to check the oil pressure, as early detection of abnormal wear signals is crucial. The type of engine oil must match; choosing the wrong one will waste money and effort.