0W20 Vs 5W20 Can You Use Them As Each Other’s Substitutes?

Explore this story to learn the differences between 0W20 and 5W20 engine oils and if you can add them in each other’s places.

Green Curved Line

The numbers before and after 'W' represent the cold and warm temperatures the oils perform best. Both the oils will offer boosted fuel mileage at up to 68°F, given 0W20 and 5W20.

Hot Viscosity

The 0W20 oils suit freezing points or fewer temperatures. The 5W20, however, performs optimally at up to 45°F, with consistent variations for their climatical limitations.

Cold Viscosity

Though we'd recommend consulting with your mechanic first when switching between 0W20 and 5W20, you can use both as each other's substitutes in cold climates, for they suit them.


Available in conventional, full, and semi-synthetic blends, both the oils don't differ much with fuel mileage. However, the 0W20 offers it slightly better due to thinner viscosity.

Fuel Mileage

The oil prices depend if they are full or semi-synthetic and by every brand. Your mechanic will guide you better for your car, and so will the user manual that comes with it.


If you drive more in freezing temperatures, you'll find 0W20 better than 5W20, which is best for above 40F climates. However, your mechanic will guide you better.

Which Is Best for Your Car?



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