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IT'S MORE THAN JUST OIL. IT'S LIQUID ENGINEERING.

  1. Home
  2. CAR ENGINE OIL & FLUIDS
  3. ENGINE OILS
  4. ENGINE OIL VISCOSITY GRADES
  5. 0W-40

0W-40

If your car requires a 0W-40 engine oil, Castrol offers a full range of options to meet the needs of every driver and vehicle manufacturer.

0W-40

CHOOSING the right 0W-40 oil for your car.

Castrol's full synthetic 0W-40 motor oil has been liquid engineered to flow like 0 Weight oil in winter temperatures, but to have the viscosity of a 40 Weight engine oil once full operating temperature has been achieved. This ensures a high level of engine protection from the moment you turn on the ignition. 

 

You might think that the 'W' in a motor oil's viscosity description stands for Weight, but that's just a common misconception. It actually stands for Winter. That's because 0W-40 engine oil is formulated to flow like a 0 Weight oil in cold conditions, yet offer the protection of a 40 Weight motor oil when the engine reaches its full operating temperature.