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
I know Harley says you can use the same oil in the primary and transmission, however since Amsoil has done their R&D, I feel they know better than me so I choose to use the specific oil for each specific application. In the many years of using Amsoil primary fluid I have never had an issue.
First started using Amsoil in my ‘01 Dyna and since 2015 on my Ultra Limited. Change my oil every 5k and haven’t had no engine problems at all. Runs Great!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Highly recommend
By 
JOE, 
a 
Verified Buyer 
on 
July 16, 2021
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