Choosing the right engine oil viscosity grade.

Viscosity is only one part of selecting an engine oil. It should be read together with the vehicle manual, the engine’s required performance specification and the product label.

Start with the manufacturer recommendation

Use the vehicle manual to identify the recommended viscosity grade and specification. That guidance is specific to the engine design and remains the final reference before purchase or use.

Use operating conditions as context

Highway distance, traffic, ambient heat, vehicle age and duty cycle can all be useful context for a product-guidance conversation. They do not replace the manufacturer’s recommendation.

Check the product information

Once the required grade is known, compare the label, intended application and available pack size. Go Oil offers passenger-car, diesel-engine and motorcycle oil categories; the right category depends on the vehicle and its documented requirement.