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Engine Oil by Grade / Viscosity

We stock a massive range of motor oils for any car, categorised into a wide range of grades / viscosities.

Multi-grade motor oils have a viscosity rating made up of 2 numbers, indicating that the oil has different flow characteristics when it is cold from when it is hot.

The viscosity rating of a multi-grade oil is broken down into two parts:

  • The number before the W is the "winter" or "cold start" rating. The lower the number the thinner the oil. This allows quick flow when the engine is started cold (cold crank). 90% of engine wear happens at this time due to the engine running in a dry state. 
  • The second number is the viscosity rating of the oil at 100 C. The higher the number the thicker the oil. If the oil is too thick for the temperatures your engine is running at, the oil will not circulate freely. If it's too thin, it may not lubricate effectively. 

If these numbers mean nothing to you, try entering your vehicle details on this page for our engine oil recommendation

Or if you have a modified / track vehicle, why no ask the Opie Experts for a personal oil recommendation instead.

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