Is my dealer trying to ruin my mower??

Discussion in 'Lawn Mowing' started by soloscaperman, May 8, 2008.

  1. soloscaperman

    soloscaperman LawnSite Gold Member
    Messages: 3,045

    I was reading the back of the oil and it says that 5w-30 bar goes from -20F to 35F. the 10w-30 goes from 0F to 110F degree's. I live in CT where in the summer its from 60- 100 F. Should I be running 10w30 instead?? Let my know because I didn't change the oil in my 2003 15HP kawasaki motor yet.
  2. You're reading the graph wrong.

    30W is the top end of the range and they should be similar.
  3. BillyRgn

    BillyRgn LawnSite Member
    Messages: 248

    on my 48 in exmark metro 48 in cut with the 15 kawi, i think its a 2002 or 2003, but i have always run HD30 in it .
  4. lawns Etc

    lawns Etc LawnSite Silver Member
    Messages: 2,277

    I run Rotella15/40 in everything and have had 0 problems since
  5. KS_Grasscutter

    KS_Grasscutter LawnSite Gold Member
    Messages: 3,335

    Uh, WHAT? You've gone FIVE YEARS without changing the oil? Do you run it like 10 hours per year or something?
  6. soloscaperman

    soloscaperman LawnSite Gold Member
    Messages: 3,045

    no, lol I got it last year. Is 5w-30 okay?
  7. tacoma200

    tacoma200 LawnSite Fanatic
    Messages: 5,426

    5w-30 won't hurt it. It good to the same high temperature as 10w-30.
  8. lawnboy858

    lawnboy858 LawnSite Senior Member
    Messages: 344

    You should run 10w-30 in walk behinds according to my dealer.
  9. totallawncare25

    totallawncare25 LawnSite Senior Member
    from TN
    Messages: 288

    Run 10w-30w kohler command oil and nothing else. That is the best oil for any 4 stroke motor.. I have had several dealers tell me that and i run it in my kawasaki motors also. 1 dealer i deal with even runs it in his vehicles.. I run it and have no issues
  10. willider

    willider LawnSite Member
    Messages: 44

    A word about oil:

    Air-cooled engines run much hotter than do water-cooled engines (the kind used in cars and trucks). This results in two things; since air-cooled engines have a greater overall operating temperature range, they're built "looser" from the factory (wider clearances) which tends to make them consume oil even when they're new. Keeping a close watch on the oil level of your air-cooled engine is very important. Secondly, the higher overall operating temperature tends to cause the oil to breakdown more quickly, causing it to lose its viscosity (ability to cling to the surfaces being lubricated). It's highly recommended that you use a good quality "straight" 30W oil in air-cooled engines. Unless you're running synthetic, don't use multi-viscosity oils such as 10W30 because they will leave it inadequately protected resulting in increased oil consumption and more rapid wear of the internal components.

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