AMSOIL Motorcycle FAQ

For those thinking about taking the plunge and trying AMSOIL Synthetic Motorcycle Oil for the first time, you may have questions. You may even have reservations about trying a synthetic oil in your bike. We have put together a collection of commonly asked questions about motorcycle oil.

Some of the questions include:

  • What are the benefits of synthetic motorcycle oil?
  • Are there any downsides to using synthetics in your bike?
  • Is synthetic oil wet-clutch compatible?
  • Do I need to use an AMSOIL Oil Filter with your oil?

Read on to see the Frequently Asked Questions about AMSOIL Synthetic Motorcycle Oils.
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Motorcycle vs Automotive Oils

What’s the difference between motorcycle and automotive motor oils?

Every once in a while someone wants to know why regular motor oil can’t be used in motorcycles. The short answer is that oils are formulated for specific applications. Motorcycle engines and automotive engines function differently, and the lubricants that service them have different requirements.

  1. Motorcycles operate at significantly higher operational speeds than automobiles, placing additional stress on engine components and increasing wear protection requirements
  2. Motorcycles operate with higher engine compression ratios than automobiles, placing additional stress on engine components and increasing operating temperatures
  3. Motorcycle engines produce nearly twice the horsepower per cubic inch of displacement as automobile engines
  4. Many motorcycles are air-cooled or use a combination air/oil design. Though effective, they result in greater operating temperature fluctuations, particularly in stop-and-go traffic
  5. Because the engine and transmission share a common sump, many motorcycles need a multi-functional fluid. Many motorcycles also incorporate a frictional [wet] clutch within the transmission that uses the same oil
  6. Motorcycles are typically used less frequently than automobiles. These extended periods of inactivity place additional stress on motorcycle oils. Rust and acid corrosion protection are critical

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Ride Hard, Run Cool

Air cooled engines on motorcycles can really get hot when you’re stuck in traffic and the ambient temperature is already up near 30°C.

Synthetic motorcycle oils have a lower sump temperature than mineral oils due to their consistent oil particle sizes. AMSOILs oils are reported to run even cooler than the HD Screamin’ Eagle SYN3 oils. The reason for this is pretty simple.

AMSOIL makes oil, Harley-Davidson makes motorcycles.

Plan ahead for your bikes maintenance this fall with an AMSOIL dealer and save money compared to buying products off the shelf of your local retail stores.

You can shop online for AMSOIL motorcycle products for any make and model. You can look up the recommendations for your bike using the Motorcycle Products Look-up Tool. Harley owners can check out the suggested oils and cross references.