Change it every other oil change versus every time with oil in primary. Better protection and performance and saves money due to fewer changes. I have nearly 70K on a Harley and she don't smoke, clutch work great, and the tranny is solid, I use Amsoil for all three Engine, Primary and Tranny and I use Amsoil filter too.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Great fluid!
By 
TROY, 
a 
Verified Buyer 
from 
Mt pleasant SC 
on 
June 15, 2021
This primary fluid is soooo much better then the Harley brand. I will never use anything but this in the future!
Bought for my primary on my 05 Dyna Wide Glide EFI because I was having trouble finding Neutral and shifting from first to second. Amsoil primary oil fixed the issues very satisfied!
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Smooth and practical
By 
MARIO, 
a 
Verified Buyer 
on 
May 21, 2021
love color, you can tell quality... love packaging... easier to poor
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
A Must Have
By 
DONALD, 
a 
Verified Buyer 
from 
Myrtle Beach, SC 
on 
May 21, 2021
Now That I switched to Amsoil Primary Fluid my Harley shifts better and and is more quiet. Very happy with it.
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