Which AMSOIL Oil And Filter For New Harley-Davidson Milwaukee-Eight?

Harley Davidson is offering a brand new V-Twin engine for the 2017 model year. The “Milwaukee-Eight” is just the eighth big twin engine design in Harley’s 114 years of existence. This new engine replaces the “Twin-Cam” engine that has been in service since 1999.

Related: See All Of Our Articles About Harley-Davidson Motorcycles And Synthetic Oil 

Correct AMSOIL Oil And Filter For Harley-Davidson Milwaukee-Eight Engines

These recommendations apply to all versions of the 107ci and 114ci Milwaukee-Eight engine.

Update- Spring 2020– AMSOIL Now Offers Synthetic Engine Oil Change Kits For Harley-Davidson Milwaukee-Eight Engines

Engine Oil- AMSOIL Synthetic 20W-50 V-Twin Motorcycle Oil is a legendary performer in Harley V-Twin engines and the Milwaukee-Eight will be no exception. Benefits include:

• Cooler running temps
• Strong resistance to thinning and shear down
• Reduced oil consumption
• Reduced friction for optimum power output
• Capable of extended oil change intervals
• Designed to resist rust and corrosion during winter storage
• Highly capable for use in engine, transmission and primary chaincase

There is no better way to provide long-term protection for your Harley-Davidson engine.

Oil Filters- We offer two oil filter options that fit both the 107 and 114 Milwaukee-Eight engine.

• AMSOIL EAOM134C- rich chrome finish
• AMSOIL EAOM134- gloss black finish

These V-Twin oil filters feature strong construction, high-capacity and the ability to remove fine particles. The synthetic filter media removes 98.7% of particles at 20 microns (which is pretty darn fine!). This further helps with maximizing engine life. The high-capacity media holds contaminants over long intervals. You can depend on the heavy-duty construction of these filters to provide steady service over long journeys.

Correct Oil For Milwaukee-Eight Transmission and Primary Chaincase

Transmission Fluid- There are two options for the Milwaukee-Eight transmission.

• AMSOIL V-Twin Synthetic Transmission Oil
• AMSOIL Synthetic 20W-50 V-Twin Motorcycle Oil

Flip a coin between these two. The viscosities are similar and both provide outstanding gear protection and improved shifting. The V-Twin Synthetic Transmission Oil is specially formulated for those that prefer a dedicated transmission oil. The 20W-50 V-Twin Motorcycle Oil is designed to provide top-shelf gear protection and shifting. It has an advantage in terms of convenience and as you use the same product in all three holes.

Primary Chaincase Fluid- Again, two choices.

• AMSOIL V-Twin Synthetic Primary Chaincase Oil
• AMSOIL Synthetic 20W-50 V-Twin Motorcycle Oil

Both are proven performers. Choose the dedicated primary fluid or the convenient V-Twin 20W-50. Either product will keep your chaincase safe and sound for many, many seasons.

Oil Capacity For Milwaukee-Eight 107 Engine, Transmission and Primary

• Twin-Cooled Head Engine- 5.0 qt. (4.7L)
• Oil/Air-Cooled Head Engine- 5.2 qt. (4.9L)
• Transmission- 32 oz. (0.95L)
• Primary Chaincase- 34 oz. (1.0L)

What Is Different About The New Milwaukee-Eight Engine?

• Available in three formats. 107ci (oil-cooled heads), 107ci (liquid-cooled heads), 114ci (liquid-cooled heads)
• Now has 4 valves per cylinder
• Two spark plugs per head
• Now has a single camshaft
• Redesigned primary chaincase
• Heat is managed by cooler combustion and larger cooling fins
• Engines have slimmer profile.
• Engines are counterbalanced and rubber-mounted to remove some (but not all) vibration
• New alternator system delivers a 50% charging capacity improvement
• Idle has been lowered from 1000 rpm (on Twin-Cam models) to 850 rpm

Improvements Of The New Milwaukee-Eight Over Twin-Cam Engines

• Runs cooler
• Run smoother with less vibration
• 10% more torque. Has a two to three bike-length advantage over Twin-Cam models across the power band
• More fuel efficient
• Puts out less emissions
• Less maintenance required (no valve adjustment needed)
• Improved charging capacity allows for more accessories

How Does the New Milwaukee-Eight Engine Sound?

While Harley-Davidson took away some of the vibration by way of counter-balancing and rubber-mounting, they were sure to leave a deep exhaust note. The Milwaukee-Eight may be more refined, but it still sounds like a boss. Here is a sound file of the exhaust note from the good people at Cycle World.
Harley-Davidson Milwaukee-Eight Big Twin by cycleworld