Europe / English
Africa / English
France / Français
Latin America / Español
India / English
APAC / English
US / English
Like other vehicles, modern dirt bikes make more power from smaller engines. In many cases, only about a liter of motor oil is responsible for protecting against wear and the devastating effects of extreme heat.
Clearly, you want to use the best dirt bike oil to ensure maximum protection and engine life.
This being the AMSOIL blog, we think AMSOIL Synthetic Dirt Bike Oil fits the bill. Read on to find out why!
What Dirt Bike Oil Must Do
Whether you’re riding the trails near home or competing in motocross races, you want to ride as effectively as possible.
Maybe that means getting out in front of your friends on the trail or grabbing the holeshot and riding your way to the finish line. As such, you’re constantly on the throttle, with some dirt bike engines revving as high as 10,000 rpm.
Add a little hot weather and road heat to the mix and your engine has a challenge on its hands. Our continent can get very hot, and these temperatures combined with a high-revving engine create severe conditions that can reduce performance and shorten engine life.
Heat Stresses Your Engine
Heat causes metal engine components to expand. If, for example, the piston expands beyond normal tolerances, it can break the lubricant film separating it from the cylinder wall and rub directly against the metal, causing scuffing and wear. Eventually, the piston will fail and wreck the engine.
Minimum Oil, Maximum Stress
Motor oil is your number-one defence against piston scuffing and wear. The oil absorbs heat and dissipates it into the atmosphere via the oil sump.
It should also form a thick, resilient film on engine parts to prevent metal-to-metal contact. Its detergents and dispersants must hold combustion by products in suspension and prevent them from forming harmful engine deposits that can lead to piston-ring sticking and power loss. Most dirt bikes, however, hold only just around 1 litre of oil:
| Make/Model | Horsepower | Litres |
| KTM 450 EXC-F | 52 | 1.2 |
| Honda CRF450R | 53 | 1 |
| Kawasaki KX 450 | 52 | 0.95 |
A minimal amount of motor oil is asked to perform the daunting task of resisting extreme heat and wear in your expensive, powerful dirt bike engine. The oil had better be up to the challenge or else the engine can wear out and fail.
AMSOIL Synthetic Dirt Bike Oil isn’t merely a rebadged automotive oil. We identified the suffering points of modern dirt bikes by working with professional American Supercross and Motocross riders. We validated the oil on the track and in our mechanical lab.
AMSOIL Synthetic Dirt Bike Oil isn’t merely a rebadged automotive oil. We identified the suffering points of modern dirt bikes by working with professional American Supercross and Motocross riders. We validated the oil on the track and in our mechanical lab.
The result is an advanced oil that delivers excellent protection against wear and extreme heat in high-revving, powerful bikes. In addition, we designed it to provide confident clutch feel. Riders need a motor oil that provides not only wear protection, but consistent clutch feel from the time the gate drops until you cross the finish line.
Oils that break down due to heat and stress lead to clutch slippage and sloppy, inconsistent clutch feel, reducing rider performance. Here, too, AMSOIL Synthetic Dirt Bike Oil proves superior, as the test results show.
In extreme simulated-start testing, AMSOIL provided superior wear protection and kept clutch plates looking new.
You can see the importance of using a motor oil specifically designed for dirt bikes. Given its excellent wear protection and heat resistance combined with its ability to deliver confident clutch feel, we think AMSOIL Synthetic Dirt Bike Oil is the best on the market and the oil you should be using.
