What is 0W30 oil used for?

0W30 engine oil is commonly used in vehicles that operate in colder temperatures. The '0' before the 'w' means it has a viscosity index of 0, indicating that the oil is incredibly thin.

Can I replace 5W30 with 0W30?

As oil warms up it loses viscosity, so the rule of thumb is to use a higher grade engine oil like 5W30 in the summer, and 0W30 during the winter.

What is the difference between 0W30 and 10W30?

The key difference is thickness. 10W30 engine oil has a higher viscosity index and is much thicker, whilst 0W30 is thinner.