Originally Posted By: BigCahuna
I never understood why people think Harley denied the use of synthetic oil. They stated that they never tested it, so that's why they didn't recommend it's use in their motorcycles. If for some reason it didn't work out, they would be liable to fix alot of motorcycles. No mfgr will recommend use of a product they never tested. And Harley STILL recommends Syn 3 for use in transmissions. Here's their ad.
http://www.harley-davidson.com/content/h-d/en_US/home/genuine-motor-oil.html
Thanks for posting the link.
That's quite interesting, as I hadn't seen that ad before.
They must have found out the SYN 3 wasn't up to scratch in the first place so the supplier of the oil reformulated it for them.
I note they're careful regarding their wording in the ad, in that they state the SYN 3 "can be used" in all 3 holes.
In accordance with their own genuine HD carefully chosen words, it can be extrapolated that they certainly do not
recommend the use of it in all 3 holes.
But that's just my interpretation, whilst wearing my service technician hat.
I could be wrong though.
It would be interesting to see an updated review of the oils in the Amsoil white paper including the new formulation of SYN 3 to see how it stacks up against the competition.
The SYN 3 didn't do very well in either of the previous editions.
Then nor did some of the other highly regarded golden halo name brand and boutique oils that some people swear by as being industry standards. LOL.