The importance of coolant maintenance

Hi all

It’s time for a technical announcement from your friends at Opies here – today we’ll be focusing on engine coolant maintenance, and all the essesntials that come with it. At Opies, we have a huge range of high quality coolants in stock and ready to go, whatever specifications you need, with discounts available specifically for Opie Oils blog readers. Important stuff, so thinking caps on!


The coolant system is one of the most overlooked preventative maintenance items in modern engines. Coolants, like lubricants, are essential fluids in order to keep engines and all heat generating mechanical systems in good working order.

It is very important to peridoically check the coolants condition. The condition of the coolant means everything to engine longevity. Todays antifreeze-coolant not only protects from freezing over winter, but also helps protect engines from common cavitation issues.

Diesel engines are usually operated under both harsh conditions and on a continuous basis. These engines and their transmissions require top quality cooling systems and coolants in order to maximise their performance and reliability, whilst minimising maintenance costs.

Did you kow?

  • Antifreeze mixes with water to prevent water from freezing
  • It raises the boiling point to avoid overheating
  • Reduces overall corrosion in your engine

Get it right!

There are lots of different types of antifreeze and it’s crucial to understand that there is no single antifreeze that’s suitable for all makes and models. The best thing to do is to always use the specific type that’s recommended by your vehicle manufacturer.

There are two basic types of coolant available today dependant on the corrosion inhibitors used:

  • Standard MonoEthyleneGlycol (MEG)
  • Organic acid technology (OAT)

The newer OAT coolants work differently than the older silicate based MEG coolants. The corrosion inhibitors in OAT coolants are slower acting but much longer-lived than those in traditional coolants. Consequently, OAT coolants typically have a longer recommended service life.

Simply put, making sure that your engines cooling system is filled with a high quality antifreeze/coolant is vital for its life span and healthy running.

You can find the full range of coolants HERE. With products from the likes of Motul, Millers, Fuchs and Red Line, we’re sure you’ll find something suitable, even if you have a classic car or highly modified racing vehicle. As a bonus for readers of the Opie Oils blog, we are offering 15% off the Fuchs Maintain Fricofin ESK Universal Antifreeze with the code ESKIMO. If this isn’t suitable for you, please go ahead and use the discount code OPIEBLOG to get 10% off anything else!

In most cases, the handbook that comes with your vehicle will indicate which type of coolant you need, but if not then don’t panic – The Opie Oils technical team is on hand to help. Just give us a call on 01209 202 944 or drop us an email to and we will be happy to supply a free recommendation on the best products for your vehicle. We’re in the office Monday to Friday 8:30 – 5:30.

That’s all for now, but remember we’re only a phone call away!


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