My best friend and my mechanic for all of his toys now uses only SCHAEFFERS in all of his engines - I now have this in my ZR-1 - not cheap @ $10.50 a quart but you get what you pay for. It is the only oil company that actually has real data sheets on their oils and they have the most zinc as well.
This is the one in my ZR-1 now
http://www.schaefferoil.com/supreme-...acing-oil.html
THE data sheet on this 7000 oil
http://www.schaefferoil.com/documents/227-705-td.pdf
Just wondering how many of you use schaeffers oil in your bike...the oil test i went to tested all kinds of oil and yes amsoil did better than almost all of the other oils except schaeffers...i wouldnt recommend using anything other than those two brands...all the rest were just awfull! Tell me what you think
http://www.hdforums.com/forum/oil-an...-all-away.html
SCHAEFFER vs MAJOR BRANDS
https://youtu.be/lrmSyyLuVB0
Schaeffer Oil Presentation
https://youtu.be/qj6wtgVV0xo
Google search for all You Tube vids on this oil company.
https://www.google.com/search?q=scha...eviews&tbm=vid