Holding Icon Oil Buyers Guide

Oil is the lifeblood of your car, but are you making sure that your car has enough of the right stuff?

If you've got the right type of engine oil and the correct amount, you stand a better chance of avoiding expensive motor repairs. But there are so many different types of oil to choose from and we're here to help.

Oil Buyers Guide

Engine oil viscosity

different map level

Different oils have a different thickness and this is also known as ‘viscosity'.

For example, a viscosity rating on a bottle of oil might be written as 5w30. The ‘5w' refers to the thickness of the oil while the engine is cold - the lower the number the better.

The ‘30' refers to the thickness of the oil at operating temperature. The lower the number, the more efficiently your car will run.

Other types of oil

As well as looking at viscosity, you'll also need to know about the different types of oil that are available:

  • mineral oil - basic protection for older cars.
  • part synthetic oil - a good in-between oil.
  • fully synthetic oil - the ultimate in engine protection.

What type of oil does my car need?

Halfords have made choosing the right type of oil easy for you. Just use our oil look-up service, type in your registration number and choose from the type of oils available for your car.

Don't forget that you can always pop into your local Halfords store and ask one of our team. And while you're there, don't forget that you can take advantage of our oil check and top-up service and our free 5-point car health check.


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