Can the Cruze use 5w40 engine oil?

[Tess]

The Cruze can use 5w40 engine oil. Engine oil, also known as motor lubricant, serves the following functions: 1. Reduces friction and high temperatures; 2. Cools the engine; 3. Cleans and removes contaminants; 4. Absorbs shocks and cushions impacts; 5. Prevents rust and corrosion. Taking the 2009 Cruze as an example, its body dimensions are: length 4598mm, width 1797mm, height 1477mm, with a wheelbase of 2685mm. The 2009 Cruze is equipped with a 1.8L naturally aspirated engine, delivering a maximum power of 105kW and a maximum torque of 177Nm, paired with a 6-speed automatic transmission.

[MaliaFitz]

I've been repairing cars for many years and often encounter Cruze owners asking about engine oil issues. The factory manual usually recommends using 5W30 viscosity, which is more suitable for its small-displacement turbocharged engine, offering both protection and fuel economy. 5W40 has a higher viscosity, better suited for high-temperature regions or older engines, providing better sealing, but under normal use, it may increase fuel consumption, result in slightly slower starts in winter, and isn't very compatible with new engine designs. The Cruze isn't a high-performance car, so there's no need to risk changing viscosity unless the manual explicitly allows it. Check maintenance records or consult a 4S shop to confirm. Don't try to save money by using the wrong oil, as it could damage valves or increase wear. Regular oil changes are more important, and synthetic oil can extend engine life.

[OscarAnn]

I've been driving a Cruze for five years and tried 5W40 oil a few times. The manual recommends 5W30 as the priority, but since I live in Hainan where there are many hot summer days, a friend suggested trying it. After using it, the engine noise decreased slightly, but fuel consumption increased from 7 liters to 7.5 liters, and cold starts were slower. Later, during a check-up at the shop, the technician said it's okay for short-term emergency use but not recommended long-term as it may lead to increased carbon buildup. Now I stick to the factory-recommended oil, with stable fuel consumption and smooth driving. I suggest adjusting based on regional climate rather than following the crowd. It might be worth considering in hot and humid southern areas, but avoid it in northern winters.

[VivianAnn]

Choosing engine oil depends on the specific situation. The Cruze originally uses 5W30, which matches the engine's viscosity requirements. 5W40 has higher viscosity, offering better protection for high-temperature components but increases fuel consumption and starting resistance. Check the manual or look up model parameters online, as some older models may be compatible. Avoid changing oil arbitrarily—maintaining synthetic oil quality is key to prevent impacts on lubrication and emissions.