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Motor Oil In Mowers

Discussion in 'Lawn Mowing' started by jgtxusa, Jan 30, 2005.

  1. jgtxusa

    jgtxusa LawnSite Member
    Posts: 123

    We have been using pennoil sae 30 weight for a while now, but a lot of mechanics tell me a probably need to change to a multi-viscosity like a 15-40. My engines are all Kaw up to 29 hp and a few 5.5 Hondas. I was just curious what all of you are using. Thanks for the help.
  2. tiedeman

    tiedeman LawnSite Fanatic
    from earth
    Posts: 8,745

    30W is what I use.
  3. chefdrp

    chefdrp LawnSite Bronze Member
    Posts: 1,384

  4. mkwl

    mkwl LawnSite Bronze Member
    Posts: 1,701

    I use Quaker State 10W-30 all year round, in all of my 4 cycle engines. I have been using it for years with no problems at all.
  5. shepoutside

    shepoutside LawnSite Bronze Member
    Posts: 1,205

    30W here too !!
  6. Texas Mower Parts

    Texas Mower Parts LawnSite Senior Member
    from Texas
    Posts: 472

    We use 10w-30 in all mowers sold and most that are repaired.
  7. brinlee lawn

    brinlee lawn LawnSite Senior Member
    Posts: 273

    10-30 In Evrything
  8. Norm Al

    Norm Al LawnSite Bronze Member
    Posts: 1,227

    multi viscosity oils have additives in them to make them light wieght when cold and heavy wieght when hot,,,,,you should not use a multi wieght oil unless it calls for it!
  9. stumper1620

    stumper1620 LawnSite Bronze Member
    Posts: 1,889

    In my climate most all engine manufacturers used to recommend straight 30
    now with ohv engines honda & kaw recommend 10-30, I use 10-30 durablend :cool2:
  10. lwcmattlifter

    lwcmattlifter LawnSite Senior Member
    from NC
    Posts: 859

    15-40 is designed for diesel engines. It has an extremely high amount of detergents in it. The manufactures know what works best in their engines, i would follow their recommendations. I'm certain if you put 15-40 in a gasoline engine you will void the warranty. I use 30 wt and 10-30 as recommended.

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