Modern drive systems are exposed to huge thermal stress. New technologies and materials constantly demand coolants with custom properties. MOTOREX's innovative and biodegradable COOLANTS range guarantees long-lasting operational reliability and comprehensive system protection for all cooling systems.
Coolants are truly multitalented, combining several properties that are crucial in cooling systems. These include antifreeze protection at low temperatures, a high boiling point to protect against heat, corrosion protection for metal components, cavitation protection, compatibility with various different materials, a stable pH to avoid the formation of deposits, good heat conductivity for efficient cooling, low electrical conductivity in electric vehicles and a long service life. These properties not only ensure that engines are protected against overheating and corrosion, they make sure that thermal management systems, which are often complex, keep running smoothly for lengthy periods.
Exhaust gas treatment technologies and other developments, such as hybridization, have led to higher engine operating temperatures. Two-phase cooling systems provide a good example of how heat management has changed. Using electronically controlled coolant circuits, thermal conditions are controlled separately at the cylinder head (phase 1) and the engine block (phase 2). The aim is to optimize consumption and emissions under all engine operating conditions. All this gives the cooling system a key role in a modern engine. And not only in combustion engines, but also in e-mobility, which has its own specific requirements.
Different fluid technologies are used, depending on drive type, materials used, operating conditions and manufacturer requirements. This means that classic cars need a different coolant from a latest-generation EV. Coolant color has nothing to do with quality and can vary from supplier to supplier. In other words, if two coolants are the same color, they do not necessarily use the same technology and may not be of the same quality. The different coolant technologies (OAT, Si-OAT, Si-HOAT and G-OAT—scan the QR code to find out more) use specific inhibitors to achieve the desired properties. If they are mixed, individual components can have a counterproductive effect within the cooling system, causing damage to it or even the engine. This means that if there is any uncertainty about what coolant technology a cooling system contains, it should be completely drained and refilled with a manufacturer-approved coolant.
When users dilute coolant from concentrate themselves, it's important to pay attention not only to the mix ratio for the given degree of antifreeze protection, but also to the quality of the water used. Since tap water often contains a large percentage of calcium or other minerals, it can have a detrimental effect on cooling systems. Deionized water (desalinated or demineralized water) should therefore always be used. Anyone who opts for MOTOREX's ready-to use coolants can be sure of playing it safe. These guarantee consistent quality as well as protecting against the serious consequences of contamination and deposits. They also provide the best possible protection against freezing.
Increasing thermal loads are putting a huge strain on coolants. Contrary to manufacturers' recommendations, it is advisable to change coolants on a regular basis every three to five years, depending on the technology. It is also important to bear in mind that the inhibitors in coolants can degrade, and refractometer antifreeze tests will not pick this up. We therefore recommend always observing the following rules:
You can obtain more information on coolants from your MOTOREX contact or from MOTOREX's online OIL FINDER, which provides a complete set of vehicle-specific data and operating fluid information.
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