Results 1 to 7 of 7
  1. #1
    Member
    Join Date
    Jan 2006
    Posts
    31
    Location
    Loveland, Colorado
    Tractor
    Yanmar YM2500

    Default I found a good oil...

    At a Harley dealer- LOL.

    I've got a somewhat tired YM2500 that still runs well, doesn't use any oil.

    What was concerning me most is that when hot, oil pressure was dropping down to 15 PSI or less at 2,000 RPM. I had been using one of the 15W-40 name brands of diesel oil with a can of STP or Bardahl added, probably making the equivalent of a 20W-50 or the like.

    I noticed in my manual that Yanmar recommended a straight 50 weight oil in the warm seasons. Never saw any at the local auto parts stores, but Harley-Davidson dealers sell a premium straight 40, 50 and 60 weight motor oil for about $4/qt. Changed to the Harley straight 50 today, made a huge improvement in oil pressure when hot. Never got below 25 PSI while grading the road when it used to drop to 15 PSI or a little less. AND the engine had noticeably less clatter.

    In the winter, I'll go back to the multigrade, but I am really impressed with the performance of this straight-grade oil. Just the ticket for the worn bearings.

    Now all I need are some chromed straight pipes...

  2. #2
    Super Member JerryG's Avatar
    Join Date
    Apr 2000
    Posts
    7,212
    Location
    Northwest Arkansas
    Tractor
    MF 1440-4 PowerShuttle

    Default Re: I found a good oil...

    If your auto place sales Valvoline oil, ask them to get you some Valvoline 50w Racing oil. I used it for years in high performance engines with good results.

  3. #3
    Super Member Dargo's Avatar
    Join Date
    Mar 2004
    Posts
    5,980
    Location
    S. IN
    Tractor
    Jinma, Foton, TYM, Belarus, Yanmar, Branson, Montana, Mahindra and maybe some green and orange too.

    Default Re: I found a good oil...

    Before anyone goes nuts, I do own a Harley; but they are not exactly an example of precision engineering. Usually you think of using straight 40 or 50 weight oil in something that has 300k miles on it or 10k hours. The tolerances in the Harley engines, well, they are not exactly the tightest. Besides, the straight 50 weight oil will not leak out where lower weight oils may.
    1982 18" Murray push mower (B&S industrial 8 hp engine!) custom deck, new blade - became unbalanced when one side old blade broke off!
    HF moving dolly - high torque! Dogbone multi-wrench too..wait, it split on first use.
    My trash man is the greatest. No matter how bad the economy gets and how bad stocks drop or how bad home values drop, his business is always picking up.

  4. #4
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
    Posts
    49,686
    Location
    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: I found a good oil...

    Quote Originally Posted by Dargo
    Before anyone goes nuts, I do own a Harley; but they are not exactly an example of precision engineering. Usually you think of using straight 40 or 50 weight oil in something that has 300k miles on it or 10k hours. The tolerances in the Harley engines, well, they are not exactly the tightest. Besides, the straight 50 weight oil will not leak out where lower weight oils may.
    Carquest carries their own brand of the 50w oil too... ( strangely enough.. it is manufactured in the same city as the valvolene oil, and napa oil... Wonder how many refineries are in that city? Hmm..

    Soundguy

  5. #5
    Super Star Member Egon's Avatar
    Join Date
    Aug 2001
    Posts
    18,334
    Location
    Nova Scotia, Canada

    Default Re: I found a good oil...

    How many leaks has the Yanmar developed with the new oil?
    Egon
    50 years behind the times
    Livin in a
    Worn out skin bag filled with rattlin bones

  6. #6
    Banned shvl73's Avatar
    Join Date
    Nov 2003
    Posts
    2,552
    Location
    NH
    Tractor
    Mahindra 2810HST

    Default Re: I found a good oil...

    I use straight 50w or 60w if it's hot, in my shovelhead. It definitely wasn't the pinnacle of engineering in it's day.

  7. #7

    Default Re: I found a good oil...

    Thanks for the tip CO Farmer I have an old Fiat tractor with about a zillion hrs that still runs good I'll try some Harley oil in it,also my Pasquali tractor
    calls for straight 40 or 50W oil in the Summer probably be just what it needs

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.