DON’T STOP
SHORT!
Brake fluid has evolved significantly in tandem with advancing vehicle technology.
COMMA speaks to VITAL NEWS on the various grades available today.
The ever-advancing technological demands and amenities of modern
vehicles mean that they weigh more, accelerate harder and travel
substantially faster than their older counterparts. Combined with
complex, computer controlled functions such as anti-lock braking
system (ABS) and the electronic stability programme (ESP), modern
brake fluids have become more sophisticated in order to keep up.
BRAKE, DON’T BREAK!
As a safety critical aspect for all vehicles, the integrity
of the braking system is non-negotiable. High
performance brake fluids are an integral part of
ensuring that vehicles brake safely and effectively.
Modern vehicles have the ability
to self-stabilise by detecting and
reducing loss of traction with ESP.
As a result, brake systems should
have an optimized response. This
requires the brake fluid to have
enhanced viscosity performances
able to transmit the precise impulses
of the system. Finally, today’s
heavier and larger vehicles call for
fluid with higher boiling points to
avoid vaporising in the system.
With this in mind, it is important for factors to recognise that DOT 3
and DOT 4 brake fluids are no longer the only specifications needed by
customers today.
TYPES OF BRAKE FLUID TODAY
There is a wider range of brake fluids which meet the various demands
of modern vehicles today.
Synthetic fluids
Synthetic fluids based on polyalkylene glycol (PAG), are the most
common types (DOT 3, DOT 4, DOT 4 ESP and DOT 5.1). They are
compatible with one another and therefore can be mixed. However,
as with oil and coolant, technicians should always comply with the
manufacturers’ specifications for the intended vehicle as using the
wrong fluid can seriously compromise braking performance.
Mineral oil-based
Comma’s LHM+ brake fluid is mineral oil based and has been used in
Citroën combined hydraulic systems. It is specifically formulated for
hydraulic systems and not suitable for use where DOT type fluids are
specified.
VITAL NEWS ISSUE 49
Silicone-based
Although marketed as DOT 5.0, it should not be confused with other
DOT specified brake fluids. DOT 5.0 is silicone-based and formulated
for specialist applications and therefore not part of the Comma
range. It is not compatible with any other type of brake fluids and not
recommended for conventional applications. Do not mix DOT 5.0 with
other brake fluids as it can cause significant damage to the braking
system.
The UK vehicle parc currently calls for the following types
of Brake Fluids*:
Specialist Fluids - 3%
Brake Fluid DOT 5.1 - 11%
Brake Fluid DOT 4 ESP - 31%
Brake Fluid DOT 4 - 55%
* Based on the mid 2016 UK Parc figures
WHEN TO CHANGE THE BRAKE FLUID
Manufacturers generally
recommend changing the
brake fluid at intervals of
between 1 to 2 years. This is
because, as brake fluid gets
older, it continues to absorb
more water which dangerously
decreases the boiling point.
Water-contaminated brake fluid causes vapour bubbles to develop. This
vapour is very compressible and absorbs large amounts of the force
applied to the brake pedal before it ever reaches the calipers – making
the brakes feel spongy.
CHOOSE IT RIGHT WITH COMMA
Comma has made choosing the right brake fluid for any car with the
‘Comma Oil Finder’ which is available for free download on Google Play
and the Apple App Store. By using the VRN, users will be presented
with a report of recommended products including engine oil, antifreeze
& coolant, transmission oils, greases and brake fluid.
For more information, please speak with your local FPS representative.
BRAKING FLUID 19