The most complete and impartial test of OILS!

Discussion in 'Oil' started by cdn-bigfoot, Apr 3, 2008.

  1. cdn-bigfoot

    cdn-bigfoot Junior Member

    It's a lot of reading, but this is the last word on OIL for Harley Davidson Motorcycles. If you don't want to read the whole report, skip to the conclusions on the last couple pages.

    Oil and the Modern Harley-Davidson® Motorcycle
    Lee C. Bussy
    September 9, 2005

    Here is the link to the report pdf file.

    Thanks to Lee C. Bussy for his hard work in compiling this report.:hii
    Last edited: Apr 3, 2008
  2. SilverFoXD

    SilverFoXD Junior Member Contributor

    Interesting and informative. Thanks for sharing.
  3. glider

    glider Veteran Member

    Very interesting report. I've read it before, some good info in it. Thanks for posting it.
  4. Dr. Dolittle

    Dr. Dolittle Experienced Member Contributor Retired Moderators

    OK, I admit I didn't read the whole thing word for word. But here's the part that really caught me off guard - changing your oil too often can be harmful to your engine! WOW, who saw that one coming? Also, the part about how important your air filter is was a bit of an eye opener. Like I've always said, I learn something every time I come to this forum!
  5. oct1949

    oct1949 Member

    Thanks Bigfoot, the report was really good. I posted a question on this forum asking whats wrong with HD oil and like the author stated you get a lot of answers.
    Being a Machine Repair all my life I have had to stay in the know of oils in my job and have worked with factory reps and Engs picking out the right and the best oil for the job on hundreds of machines in my time.
    Just like the the report stated some of our Engs at work were taken in by that ball bearing test years ago. They thought that someone had reinvented the wheel.
    After a lot of money was spent on SYN oils and studied for several years the SYN oils were found to pay off mostly on gearboxes that were in real high heat areas..300* and up. They did last longer, and we keep it in those.
    But after the dust settled we returned to what the Manufactor guidelines stated to use in 95% of the jobs, usually gear lube and followed the oil changing times.
    Some of the problems we had with SYN was high oil usage caused by seals leaking and not being repaired, the SYN could not be blamed for that, so another reason to go back to gear lube.
    You know GM had to save money. This way they saved money on the Oil and repair time...

    This was the best report on HD oils that I have found and its a good one.
    thanks.... Maybe HD oils are pretty good after all.....
  6. shortbox

    shortbox New Member

    I must be doing something wrong when I click on the link to the pdf file containing the report I can't get anything to display. Maybe someone can tell me what I am screwing up as I would very much like to read the report.


  7. cdn-bigfoot

    cdn-bigfoot Junior Member

    Perhaps the best news of all out of that report.
    It appears Citgo may not be the manufacturer of HD oils.