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10w-30 or Straight Oil????

Discussion in 'Lawn Mowing' started by Petr51488, Oct 11, 2004.

  1. Petr51488

    Petr51488 LawnSite Silver Member
    from NJ
    Messages: 2,377

    Both my log splitter, generator, and exmark tell me to use 10w-30 oil. My dad works in the steel industry and he sayes that straight 30 will work. Is there any differences? Anything bad about using it?
  2. wmsland

    wmsland LawnSite Member
    from NE OHIO
    Messages: 127

    Follow the manufactures instructions, I'm sure they know what they are talking about.
  3. Petr51488

    Petr51488 LawnSite Silver Member
    from NJ
    Messages: 2,377

    On the chart thats in the manual has 30 on it.. but from 60 degrees to 120 degrees.. I wont be cutting grass any lower than that..
  4. green with envy

    green with envy LawnSite Member
    Messages: 219

    Follow the manual !!!!
  5. txlawnking

    txlawnking LawnSite Bronze Member
    Messages: 1,905

    At least in this case..

    At cold temperature ( like start up, and cold ambient outside temps), 10w30 will flow better than 30 weight. The better the oil flows, the quicker it gets to the bearings, the quicker it gets to the bearings, the longer your engine will last.
  6. out4now

    out4now LawnSite Bronze Member
    from AZ
    Messages: 1,796

    Used to use staright 30 to meet man. severe duty requirements. 10W-30 has lower resitence to flow for winter but it never gets that cold here.
  7. Flex-Deck

    Flex-Deck LawnSite Silver Member
    Messages: 2,845

    I use synthetic 10-30 exclusively - truck - car - WB - extra deck.

    I don't think you can wear an engine out with synthetic in it. I change filter and re add to the full mark at 50 hrs. and change everything at 100 on the small engines. They never use a drop. Have one 15 HP Kohler, and one 15 HP Kawasaki. Thanks, Brad
  8. Brandyanna

    Brandyanna LawnSite Member
    Messages: 29

    30 wt is fine when it is warm.

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