Transmission Oil Question Answered By Spectro

Question:  Can I use Spectro’s Heavy Duty Platinum 6-Speed Transmission Lubricant in either a 4 or 5-Speed transmission?
Answer: Yes. While the 6-speed transmission lubricant was designed for the newer Harleys, and after market transmissions such as Baker Drivetrain, it incorporates extreme pressure additive technology not required in the older 4 and 5-Speed transmissions. Therefore it meets or exceeds the requirements for older transmissions.

This is a question and answer section suggested by readers. IF you have an engine or transmission oil question, email

3 Responses to “Transmission Oil Question Answered By Spectro”

  1. 1 Rogue Sep 21st, 2011 at 7:12 am

    For who ever is interested I am using it in my motorcycles and am Very Happy with it.

  2. 2 Calif Phil Sep 21st, 2011 at 8:16 am

    It is my new favorite oil as well.

  3. 3 Darin Maltsberger-Instructor @ MTI Sep 21st, 2011 at 12:52 pm

    Spectro Oils are utilized in our Motorcycle Technician training program here at Mitchell Technical Institue. The advanced engineering that Spectro has invested in their research and development of new and superior products is amazing. Oil is the substance that keeps our bikes moving.Without it, everything comes to a grinding halt. We need oils capable of meeting the needs of our engines as well as transmissions and the needs of off-road machines as well as touring bikes. Spectro has an oil that fits every purpose. Thanks Spectro!

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Cyril Huze