Like the other two holes I use Amsoil Primary Fluid in the third hole because it helps run the primary quietly and smoothly. I put up to 18,000 - 20,000 miles on my MC every year so its important that I get great protection and longer times between oil changes. I start the riding season with Run For The Wall. The group of veterans rides from California to Washington to honor those names on the Vietnam Memorial Wall and the Middle Eastern Conflicts Wall. That ride puts a motorcycles through some tough weather and miles ( 6800 for me). Amsoil protects my motorcycle and give me confidence I will be able to complete the mission.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Great Oil
By 
WILL, 
a 
Verified Buyer 
on 
September 22, 2021
Very happy with Amsoil products.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
No slip, all grip
By 
FABIAN, 
a 
Verified Buyer 
on 
September 17, 2021
My mechanic thought clutches might slip, but it did not
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Big difference
By 
DAVID, 
a 
Verified Buyer 
from 
New York 
on 
September 15, 2021
I won't put anything else in my primary but this stuff. I change it often as it get really dirty, I know Amsoil says it will go longer, Just old school. Love this stuff.
Using Amsoil Primary Fluid in all three Harley Davidson's I own and the several bikes I routinely service for customers takes one more worry/concern off the table. With a lubricant designed specifically to work well with the chains, gears, clutch discs, springs, seals, etc. you can rest easy knowing that everything inside the primary is properly lubricated regardless of the temperatures you ride in. Get the most life out of your clutches and compensator by using Amsoil Primary Fluid. Good engine oils belong inside engines, not primarys.
reason for 4 stars is that i put the temperature gun on the head and
it was definitely 15 degrees cooler than with other oil . i mostly ran
hd stuff for the shovel
still to early to tell as riding has been limited due to weather
for the 70 miles i rode im happy with the motor oil
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