Spectro Answers Your Oil Questions

HDplatHD6SPEED3 new interesting questions asked to Spectro Oils and their answers.

Question. What is “detergent” in oil? Can it affect rubber parts? Is it like detergent for washing dishes?
Answer. Detergents are a necessary part of modern oils. They reduce sludge build up, keep oil passages clean and help your oil filter do a better job. Lubricating oil detergents are specially formulated for oils, and have totally different chemistry than cleaning detergents. Detergents found in modern oils will have no effect on rubber parts.

Question. Do Spectro Oils have a shelf life? I’ve had a new quart in a never opened plastic quart bottle in my shed for about 6 or 7 years. The shed is in a location with hot summers and cold winters. Can I use it?
Answer. As long as the bottle is sealed, the oil shelf life will be 10+ years. It won’t be affected by changes in temperature while in storage.

Question. I have a 2007 Harley-Davidson Ultra Classic Electra Glide motorcycle. 44,000 miles. My transmission final drive bearing is making noise. 2007 is the first year of the 6 speed for this model. I have used your 75w140 since it was brand new. I change it every 10,000 miles. The book calls for a change at 20,000. This motorcycle is 100% stock and is not hot-rodded (it’s a Harley). Mostly highway miles. Is this oil to heavy? Have you heard of issues with this transmission.? Is 10,000 miles between changes too long? Is there a better fix for this than the Motor Co.?
Answer. You are correct, there have been many bearing failures in the early 6-speed transmissions. A Google search or a search of HD message boards and forums will provide some solutions. There are several factors that cause the bearing to fail, none of them are lubrication related. If your bike is equipped with the automatic primary chain tension adjustor, they have been known to over-tighten the primary chain, causing excessive bearing load which leads to failure. Several companies make an aftermarket manual chain adjustor. I’m familiar with the Baker version, it works very well. Here is a link with more info, there are many more like this. Touring Models Transmission Bearing Failure.  75w140 is the correct weight to use with the 6-speed. We recommend changing at 10,000 miles or once a year, whichever comes first.

Zipper's

3 Responses to “Spectro Answers Your Oil Questions”


  1. 1 ROGUE Jul 8th, 2013 at 7:39 am

    I use Spectro Oils and as a matter of fact I have just changed the Engine, Primary and Transmission Oils as part of my pre Sturgis ride.
    Last year on the way to Sturgis I had a Inner Primary fail. I was able to make it to Klock Werkz in Mitchell SD where they did an excellent job of repairing it.
    It was suspected that the automatic primary chain adjuster was the problem. When I returned home I installed the BAKER Chain Adjuster and all is well.
    There is a tech article on my install at http://www.bikernet.com/pages/story_detail.aspx?id=10764

  2. 2 Blackmax Jul 8th, 2013 at 4:21 pm

    Ditto with Rouge…..
    I use the stuff and I Luv the stuff
    No better lubricants out there
    Bar None !!!!!!

  3. 3 Blackmax Jul 8th, 2013 at 4:22 pm

    Sorry, Rogue, I type to fast for my own good
    Apologies …..

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