Haven't noticed any real difference, but like that it's Primary specific. I figure, it only holds one quart, you might as well use the best you can get...
Have been using AMSOIL in my 2006 HD Fatboy since I purchased it in 2009. I also use AMSOIL in my 2007 Tundra. Oil in HD gets changed every 5 to 6 thousand but has gone longer but with AMSOIL I don't worry. I order my V TWIN oil change kit every winter so when spring riding weather hits I can have a fresh oil change ready to go.
Been running this along with trans fluid and 20/50 oil in my 21 year old Harley with 98,000 + miles. Change every six to eight thousand miles. She’s running like a champ - No leaks and no major repairs, can’t ask for more.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Harley Davidson
By 
Michael, 
a 
Verified Buyer 
from 
South Carolina 
on 
February 18, 2021
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