Should the RX5 use 5w30 or 5w40 engine oil?
4 Answers
The entire Roewe RX5 series is equipped with a 1.5-liter turbocharged engine, so 5w30 viscosity engine oil is sufficient. Below is relevant information about the Roewe RX5: Introduction: The Roewe RX5 is an internet-connected SUV featuring Porsche-tuned chassis, GKN intelligent all-wheel drive system with the same origin as Land Rover, fully independent suspension system, and four-way high-speed CANBUS system bus, comprehensively enhancing driving and riding quality. Powertrain: The Roewe RX5 is equipped with a 1.5T turbocharged engine, paired with either a 6-speed manual transmission or a 7-speed dual-clutch transmission, delivering a maximum power of 124kW (169PS) and a peak torque of 250Nm, consistent with the power parameters of the current model.
I've been driving the Roewe RX5 for several years, and based on my daily driving experience, the manual's recommendation of 5w30 oil is quite suitable. It offers good flow performance, quick cold starts, proper engine lubrication, and fuel efficiency. Especially in northern winters, 5w30's strong low-temperature flow reduces wear issues. If you frequently drive long distances or in high-temperature areas during summer, such as southern coastal regions, switching to 5w40 can provide extra protection by preventing oil film thinning. But honestly, 5w30 is sufficient for 95% of situations—don’t unnecessarily change the viscosity grade. Choosing a quality synthetic oil brand is more useful than tweaking viscosity. Check the oil level every 5,000 km, and avoid cutting corners with low-quality oil—this keeps the engine quiet and durable. In short, the manual is the most reliable guide; overthinking viscosity just adds unnecessary costs.
As someone who frequently works on cars, I've dealt with many RX5 engines, and I generally recommend using 5w30 oil. 5w30 represents good low-temperature fluidity and moderate high-temperature viscosity, matching modern turbocharged designs to provide efficient lubrication and improve fuel economy. However, in high-temperature environments, such as above 35 degrees or frequent heavy-load driving, 5w40 is more stable, with thicker oil film to prevent overheating. The key is not just to look at the numbers—choosing full synthetic oil can extend engine life and ensure API-certified quality. The replacement cycle is recommended to be around 8,000 kilometers, adjusted based on usage habits. Simple maintenance like checking the dipstick monthly can avoid major overhauls. Remember, engine health relies on careful maintenance, and viscosity disputes are minor.
As a long-time RX5 owner, I believe 5w30 is the wiser choice. Its lower viscosity provides faster engine protection during cold starts, ensuring smoother driving and better fuel efficiency. Unless you're in extremely hot climates or frequently engage in high-speed rallying, 5w40 is unnecessary and may even increase fuel consumption. Pay attention to oil quality, use certified synthetic oil, and change it every 8,000 kilometers. Don't underestimate engine oil – proper maintenance extends engine life without compromising driving pleasure. Just follow the manual's specifications.
