The Knowledge

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How important is the correct antifreeze?

The design of modern engines involves the use of many different materials, including a variety of alloys, solder and aluminium in addition to the familiar cast iron, copper and brass. All these metals require protection against corrosion whenever they come into contact with the engine's coolant.

The antifreeze therefore must not only prevent freezing in winter (and boiling in summer) but it must also provide a high level of corrosion protection.

The latest antifreeze products contain an advanced inhibitor package which helps retain an enhanced level of protection for up to 5... click here to read more

Why does my air conditioning seem less efficient?

Over a period of time, air conditioning systems can lose some (or sometimes all) of their effectiveness. This is mainly caused by drivers not using the system all year round and, of course, not understanding the importance of regular servicing. Most vehicle manufacturers advise running the air conditioning system at least once a week throughout the year.

The biggest problem by far is loss of the system’s refrigerant. Most air conditioning systems have a seepage rate of around 10% a year but this can increase dramatically in systems which are not used for long periods. This is ... click here to read more

What are 'Asymmetric' & 'Directional' tyres?

Directional Tyres

A tyre which has been designed to operate equally well in either direction will inevitably be compromised in terms of ultimate performance. Directional tyres, however have been designed to rotate in one direction only, so performance - wet grip, directional stability and handling - can be optimised. 

Obviously the tyre must be correctly fitted and rotate in the direction indicated on the sidewall! 

Asymmetric Tyres

An asymmetric tyre gains its’ performance advantage through having different tread patterns on its’ inner and outer ... click here to read more

What is Bioethanol?

In the search for a source of renewable energy, Bioethanol is emerging as viable alternative fuel for motor vehicles.

Already popular in Brazil, Bioethanol is an alcohol produced by fermenting crops such as wheat or sugar beet, blended with conventional fuel (commonly 85% ethanol and 15% petrol).

Bioethanol is also capable of reducing carbon dioxide (co2) emissions by 70%. This is not achieved through reduced exhaust emissions (which are similar to conventional fuels) but because the crops used to manufacture the fuel absorb co2 from the atmosphere as they grow.

... click here to read more

Why do I have to change my brake fluid?

Service schedules on virtually all modern cars recommend changing the brake fluid at intervals of 2 (or sometimes 3) years. This is because brake fluid is hygroscopic, which means that it absorbs moisture from the atmosphere.

The boiling point of the brake fluid will therefore decrease over a period of time. Heat generated during braking may result in vapour forming in the system and (because vapour, unlike fluid, is compressible) may cause loss of pedal pressure or even brake failure.

Changing the brake fluid is a straightforward and inexpensive procedure which will help to... click here to read more