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Although relatively unknown in America, Motul products (pronounced Mo-tool) are revered internationally as the best protection you can use for racing engines, gearboxes and hydraulic systems. We had the opportunity to use them a few years ago while doing some pro racing and were so impressed, we continued to use the fluids and lubricants afterward even though we then had to pay for them! Here is some information on all three of the product groups we use.
Lubricants for Racing Engines
Motul formulates lubricants for a huge variety of applications from motor oils specifically designed for and approved by Audi, Ford and Toyota to fork oils for racing motorcycles. Among their vast line are the competition lubricants. These oils, designed specifically for our purpose, are based on the ester molecule. A friend who is a chemical engineer tells me this molecule is the best base chemistry known for producing lubricants. Motul lubricants are 100% ester products, using both the polymer ester and complex ester molecules. These strong base stocks are then chemically modified for specific purposes with additives creating oils with zero sheer loss and temperature resistance for stable pressure. Friction modifiers are added for increased power output. From small, high revving engines in short races to big V-8s at Le Mans, Motul has a racing oil specific to your application.
Your racing engine is the most expensive single part of your car. For decades we have all been using "dinosaur oils" only because nothing better was available. Today we have the benefit of years of chemical engineering research and can use the knowledge it has produced to protect our investmentsin expensive hardware. Motul competition oils are a bit more expensive than what you find at the local auto parts store but the slight additional cost is recovered many times over in engine life. Select the correct viscosity for your car below.
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Racing Gearbox Lubricants
Like the 300V competition engine oils, Motul's gear train lubricants are formulated 100% from the ester molecule for the absolute best protection for the sliding surfaces of gears. Each transmission, transaxle or differential lubricant is formulated for a specific purpose. We use these gear oils ourselves in our Formula Fords, Formula Continentals, Formula Atlantics and the highly stressed gearboxes in Indy Cars. Some cars come equipped with gearboxes slightly undersized for the application. We have run some of these before and were forced to replace the lower ratio gears at the 300 mile mark to avoid gear surface fretting and gear breakage! Unfortunately, we were not able to use Motul gear lubricants in that instance. We feel Motul would have increased gear life.
The second most expensive assembly of your race car is the transmission or gearbox. A single gear set for a Formula Ford is over $200. Gears for larger cars are even higher. It only makes sense to give your gearbox the best protection possible. From Formula One to IRL, and ALMS to the Japanese GT Championship, Motul gear oils are the choice of professionals. We have the same technology available to us to extend the life of these expensive parts. Select the oil proper for your application below.
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Racing Brake Fluids
Racing brakes have two enemies: heat and moisture. It's no secret that the brakes on our race cars generate a great deal of heat. The brake rotor is a heat storage unit intended to store the heat energy generated in a braking zone until sufficient time is available to release it into the air. What is not so obvious is that almost as much heat is transmitted through the pads and through the pistons to the fluid in the calipers. In extreme cases this boils the fluid, turning much of it to a gas producing, at best, a spongy pedal. Many years ago we had a car come into the pit at Road America with no brake pedal what-so-ever due to boiled fluid! For this reason, it is essential to use a brake fluid with a high boiling point.
Brake fluids are hydroscopic. That is, they absorb moisture from the atmosphere and that water content lowers the boiling point. But even brake fluids with high boiling points are not all created equal. Some degrade drastically with only a small water load. Compare the statistics below sorted by dry boiling point.
Racing Brake Fluids Sorted by Dry Boiling Point
As you can see from the data, Motul 660 has the highest dry boiling point and Castrol SRF the highest wet boiling point. The only time you can be assured of running completely dry fluid is the session immediately following a complete brake fluid flush. Since it's obvious that we are always on the track with some amount of water in the fluid, let's look at the same list but sorted by wet boiling point.
Racing Brake Fluids Sorted by Wet Boiling Point
From this list it becomes apparent that Castrol SRF is the clear winner. That is until you consider that it sells for $80 a pint! If you are running a fast, heavy car and continually boiling the fluid, if you have installed larger rotors on that car and increased airflow to the rotors and calipers, if you are using water cooled brakes and brake fluid recirculation -- if you have done all that and are still boiling the fluid, then we recommend Castrol SRF. For all the rest of us Motul 600 or Motul 660 are the obvious choices. Make your selection here.
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