T595 Fork Oil. Which Grade?

Discussion in 'Technical Help' started by Wheelnut, Oct 21, 2020.

  1. Wheelnut

    Wheelnut Well-Known Member

    Oct 12, 2019
    79
    68
    Alston
    #1 Wheelnut, Oct 21, 2020
    One of the fork seals has popped on my 1998 Daytona T595 so I'm just about to order the parts. Seals are no problem, but trying to find out which grade of fork oil to use has defeated me.

    It's not in the owner's manual, can't find it by googling, and can't even find a mention on this forum, although it must be here somewhere.

    Anyway, can any of you wise folk enlighten me as to whether to order 5w, 10w, 15w or whatever?
    Much appreciated!
     
  2. Callumity

    Callumity Elite Member

    Feb 25, 2017
    3,362
    800
    Nr Biggar
    #2 Callumity, Oct 21, 2020
    Last edited: Oct 21, 2020
    • Like Like x 1
  3. Wheelnut

    Wheelnut Well-Known Member

    Oct 12, 2019
    79
    68
    Alston
    #3 Wheelnut, Oct 22, 2020
    I reckon the above list of fork oil specs offers more questions than answers, and it certainly makes a mockery of quoted viscosity by the makers.

    But, if the Showa 07 oil is standard - and this seems to be unobtainable - a fairly close substitute seems to be Motul 5w Factory Line, so I've ordered that to give it a try.
     
    • Like Like x 1
  4. bananaracer

    bananaracer New Member

    Aug 4, 2020
    12
    3
    Dunmow, Essex
    #4 bananaracer, Jan 8, 2022
    I need to refresh my fork oil too (for a 955i) - has anybody else done this and can they recall what grade they used?
     
  5. Exuptoy

    Exuptoy Senior Member

    Feb 10, 2018
    362
    113
    Maesteg, South Wales
    #5 Exuptoy, Jul 2, 2023
    I know this is an old thread but I need to know too.
    The manual lists Showa SS-8 which some say is 10wt. Obviously things have changed in almost 25 years. Anyone have an idea on the best oil for the T595 forks? I can get Castrol 10w fork oil for less than £15 for 1.5litres. Each fork takes 589mm then set the air gap at 76mm once you’ve pumped the damper rod.
     
  6. sprintdave

    sprintdave Nurse, think it's time for his medications.

    May 25, 2014
    1,679
    750
    Birmingham
    #6 sprintdave, Jul 3, 2023
    The general concensus of opinion seems that 10w oil is closest to the Showa SS8 spec. I would think that any major oil company's 10w fork oil would be fine, as I'm sure Castrol will be.
     
  7. Exuptoy

    Exuptoy Senior Member

    Feb 10, 2018
    362
    113
    Maesteg, South Wales
    #7 Exuptoy, Jul 3, 2023
    Cheers Dave. I’ve been pointed in the direction of this oil selection chart which changes the way the selection criteria applies and uses something other than viscosity. Apparently a better match for the SS-8 is Silkolene RSF7.5.

    https://transmoto.com.au/comparative-oil-weights-table/
     
    • Useful Useful x 1
Loading...
Similar Threads - T595 Fork Oil
  1. Wheelnut

    T595 Front Fork Height Setting

    Wheelnut, Jul 28, 2020, in forum: Daytona
    Replies:
    7
    Views:
    2,272
    StuarT595
    Jan 8, 2021
  2. Exuptoy

    Breaking…98 Tornado Red T595i, Full Bike Available.

    Exuptoy, May 2, 2025, in forum: Parts, Accessories & Clothing
    Replies:
    29
    Views:
    2,298
    Mr.White
    Sep 21, 2025
  3. Baldrick174

    T595 Left Middle Fairing

    Baldrick174, Mar 23, 2025, in forum: Daytona
    Replies:
    0
    Views:
    446
    Baldrick174
    Mar 23, 2025
  4. Michael B

    T595 Commissioning

    Michael B, Jul 21, 2024, in forum: Technical Help
    Replies:
    4
    Views:
    700
    joe mc donald
    Jul 23, 2024
  5. Rossco196x

    T595 Daytona Instrument Removal

    Rossco196x, Jun 2, 2024, in forum: Technical Help
    Replies:
    0
    Views:
    446
    Rossco196x
    Jun 2, 2024

Share This Page

Sign up