What oils do you run?

Discussion in 'Mechanic and Repair' started by Craftybigdog, Jul 25, 2002.

  1. Craftybigdog

    Craftybigdog LawnSite Senior Member
    Messages: 425

    I have a john deere with a 25 hp kohler and I use synthetic oil do you guys recommend the same and do you follow the hour change intervals or do you do it sooner, also whats the most you have seen on a hr meter on a gas kohler motor before it was rebuilt, thanks alot
  2. khouse

    khouse LawnSite Bronze Member
    Messages: 1,465

    i use Amsoil and change it every 100 hours. it's still very clean. some people change the oil at 50 hrs. i use Amsoil 100 to 1 two stroke in my other equipment and they run great.
  3. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,698

    I'm using Mobil 1 10w30 in my Kohler 25. Eric Erickson (Eric Elm) was getting 4,000+ hours out of his Kohlers.
  4. Jman

    Jman LawnSite Member
    Messages: 217

    I was told of an engine in Oklahoma that had between 24,000-27,000 hours on it. CH18, it was used on a pumping system to pump natural gas out of the ground. They ran synthetic oil and it was converted to run on the natural gas it was pumping itself. It ran 24/7 and was serviced once a week. Amazing how long one will run when it doesn't have the severe dirt environment most of ours see. By the way the engine outlasted the hour meter. It was in service over three years. They just rerung it and put new heads on it and it is there for a backup when needed.
  5. olfrt

    olfrt LawnSite Member
    Messages: 48

    FYI (for you info)
    Engines running on propane or natural gas don't have the same enviroment (dirt) and will run cleaner.

    Also propane or natural gas will run cleaner than pump gas by far
    just ask the guys runing forklifts using propane. The oil just don't get dirty near as often as with regular gas.

    SLIMDAWG1 LawnSite Member
    Messages: 22

    Natural gas burns cleaner thus not as much oil contamination with blow-by.
  7. Jman

    Jman LawnSite Member
    Messages: 217

    Natural gas and propane also do not lubricate the valve train system. It is a very dry fuel. I beleive the synthetics helped out here. Normally on engines that run propane or natural gas do good to get 500-1000 hours before valve work is needed.
  8. Arnold

    Arnold LawnSite Member
    from Wyoming
    Messages: 194

    Natural gas does burn much cleaner but the real cause of long live I believe is the constant run time there is no heating up of the top end parts in the engine during shutdown. I was always told buy a hot rod builder an extra minute of idle to cool every thing down was worth a 1000 more miles in the long run.

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