My current ride “Seabiscuit’ came from the garage of a millionaire, talk about culture shock to the poor thing. But he is in addition to being multi business owner, works as an Oil Research and Development Specialist. And when I flew to Fla to pick up the bike he picked me up at the airport in Naples and talked techno stuff I have no idea what spewed out of him for an hour ride about oil,, quantum this, elasticity of molecular that,, but bottom line is he used Amsoil, I figure, ok. One interesting thing I did not know was oil can be too slick for a Harley. It has to have some fancy “tach” quality or the bearing race can spin around the shaft, and the actual bearings not be working and you can clearly see the problem there. He said HD oil was the worst in all his findings, in every category of every test,, but that is the oil I’ve always used since 1973, with no oil related issues. But I now use Amsoil since that’s all that’s ever been in Seabiscuit, so far so good.

I recently spoke with an Indy who recommended airplane oil. Said it allows things to "spin" as they should instead of " hammer" - has some failed parts for proof. Don't know enough to say I agree or not, but interesting nonetheless.

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I wanted to post a poll to find out what kind of engine oil you use to get an idea of what's being used.


Please keep all conversations and questions on oils to the oil forum instead of posting them in the POLL threads.

The POLL threads are for gathering information on the products and not for discussions about the products themselves .

The OIL forum is for the questions and answers.

Oil - Harley Davidson Community

Thanks