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Castro 30w to Synthetic Castro oil

Discussion in 'Lawn Mowing' started by J. Davis, Oct 18, 2001.

  1. J. Davis

    J. Davis LawnSite Member
    Posts: 42

    I have a 15 Kaw. twin with 120 hours on it. I change the oil every 40 hours using Castro 30w. Would it be possible to change from a natural oil to a synthetic oil at this point.:confused:
  2. Esby

    Esby LawnSite Senior Member
    Posts: 662

    I would think so, its always best to stick with the same oil, especially when differing between synthetic and non, but your engine doesn't have that many hours on it. You probably only have changed your oil 4 times or so(once after 8 hrs and every 40 after.) I would switch.
  3. Albemarle Lawn

    Albemarle Lawn LawnSite Bronze Member
    Posts: 1,544

    I have a Kohler 25, sythetic oil used since first change, now at about 1800 hours.

    Oil changed every 300 hours. (twice per year at 600/ yr).

    We use Mobil 1 15w-50. Use it in everything- Mowers, my cars, the hydro on my Gravely 260Z's, and in the Diesel engine in my Mitsubishi-Fuso landscape truck.

  4. Premo Services

    Premo Services LawnSite Bronze Member
    Posts: 1,516

    J. davis
    I have a 17 hp, and a 23 hp kawasaki. I emailed eXmark about the synthetic oil and they said to wait until the engines had 200 hrs. on them, because the seals need to be seated before the synthetic oil is used.

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