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Results 1 to 11 of 11
  1. #1
    Seat Tester
    My Bike(s)
    '06 Stratoliner
    Location
    Alto, MI
    Posts
    96

    Question 20W50 or 20W40 Oil?

    Hey all,

    I just accidentally picked up 6 quarts of 20W50 oil for my Strat. Will it be to thick at higher temps? Or should it be OK? It's Honda HP-4 Semi-Synthetic?

    Thanks,

    Franklyspeaking

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  3. #2
    Sit speling cheker
    My Bike(s)
    Suzuki C90T
    Location
    Chandler Arizona
    Posts
    1,870
    I use 20w50 year round here in Arizona. I've used that weight on all bikes I've ever owned. You may not need it year round back there, but when it get's above 85 I'd use it
    --------------------------------------------------
    I don't care if it's the unholy four, John Wayne and Dorothy Lamour
    I just don't wanna talk to him now......


  4. #3
    Newbie
    My Bike(s)
    Roadliner Midnight 2006
    Location
    Kansas
    Posts
    7
    Quote Originally Posted by Franklyspeaking View Post
    Hey all,

    I just accidentally picked up 6 quarts of 20W50 oil for my Strat. Will it be to thick at higher temps? Or should it be OK? It's Honda HP-4 Semi-Synthetic?

    Thanks,

    Franklyspeaking
    20w50 is the only thing I run in my motorcycles. I am pretty sure Yamaha has changed their recommendation from 20w40 to 20w50. I run Lucas synthetic, but I am brand loyal. Honda HP-4 will be fine.

  5. #4
    M-J Lifetime Achievement Award
    My Bike(s)
    '10 Kaw Vulcan 900 Custom
    Location
    Ocala, FL
    Posts
    8,713
    Quote Originally Posted by 1fastbob View Post
    20w50 is the only thing I run in my motorcycles. I am pretty sure Yamaha has changed their recommendation from 20w40 to 20w50. I run Lucas synthetic, but I am brand loyal. Honda HP-4 will be fine.


    There really isn't that much difference......especially with a synthetic or blend. The "chart" in most manuals shows a WIDE range of acceptable viscosities in a "normal" temperature operating range.

    Despite having the same cold rating, you might find that the "50" causes the engine to crank a bit slower if you try to start it in the middle of a Wisconsin winter.
    Don't believe everything that you think.

  6. #5
    Seat Tester
    My Bike(s)
    '06 Stratoliner
    Location
    Alto, MI
    Posts
    96
    Thanks,
    I went with the "50." Getting crush the proper gaskets from my dealership was pure hell. If you are ever around Grand Rapids, Mi., do not get your bike worked on by Shawmut Hills Cycle. They are complete idiots!

  7. #6
    In The Zone
    My Bike(s)
    2008 ZZR600
    Location
    Under a rock in Texas
    Posts
    2,757
    Not much difference, I don't even know why a 20-40 exists. You will be fine w/ 20-50, at least in the summer.
    The "other" ZZR rider.

  8. #7
    In Training
    My Bike(s)
    2007 Stratoliner S
    Location
    West Michigan
    Posts
    143
    Quote Originally Posted by Franklyspeaking View Post
    Thanks,
    I went with the "50." Getting crush the proper gaskets from my dealership was pure hell. If you are ever around Grand Rapids, Mi., do not get your bike worked on by Shawmut Hills Cycle. They are complete idiots!
    Go to Action Auto for the proper gaskets. They are 3 for about $2.
    1/2" - M14. #65310
    Jim

  9. #8
    Seat Tester
    My Bike(s)
    '06 Stratoliner
    Location
    Alto, MI
    Posts
    96
    Thanks for the gasket tip, Jim!

  10. #9
    Handlebar Consultant
    My Bike(s)
    2009 V Star 950
    Location
    Intersection of I-81 and I-70
    Posts
    643
    Quote Originally Posted by Franklyspeaking View Post
    Hey all,

    I just accidentally picked up 6 quarts of 20W50 oil for my Strat. Will it be to thick at higher temps? Or should it be OK? It's Honda HP-4 Semi-Synthetic?

    Thanks,

    Franklyspeaking
    20W50 is fine, I use 15W50 Mobil 1. Oil doesn't get thicker at operating temperature, it gets thinner. At operating temperature the molecules of a 15W50 or 20W50 oil mimic the molecules of a 50W oil but is actually thinner than at "cold engine" temperature so the benefits are two fold, you have a free flowing oil with the protection of a 50W oil. This is somewhat of a simplified explanation but basically that's how it works.

  11. #10
    Newbie
    My Bike(s)
    2006 Star Roadliner S
    Location
    Northern, VA
    Posts
    1
    I went to 4 or 5 places looking for that 20-40 stuff... gave up, used Motul 7100: 15w50... Works fine in my Ducati (12K+)

  12. #11
    Where Am I ?
    My Bike(s)
    2006 Stratoliner 'S'
    Location
    Woodbridge, VA
    Posts
    25
    MOBIL-1 Full Synthetic 20W-50 for Air-Oil Cooled V-TWINS is all I ever use Works like a charm and my engine is as smooth as a baby's behind :p LOL


 

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