[C320-list] Yanmar 3GM30F - Synthetic - why not
Robert Seastream
robert.seastream at comcast.net
Mon Jan 18 14:05:04 PST 2010
It makes most sense to change oil & filter at fall haulout, so that
the dirty oil and filter don't sit in the engine through the winter.
At spring launch you can simply start the engine and go, knowing the
oil/filter are clean. For me, after spring launch I start the engine
and let it run for 30-60 minutes, then change the oil/filter again. I
feel this 'flushes' the engine clean, since the initial fall change
did nothing for any old oil left in the upper engine regions after
shutdown. Perhaps I'm an old fuddydud. However, if I had to settle
for one oil change, it'd be at fall haulout. At any rate, most of us
only put a few hundred hours on the engine per year.
Bob
On Jan 18, 2010, at 5:01 PM, Pat Moriarty wrote:
> I have a question about the logic in this change system. You pull
> the boat and change the oil, now it sits all winter not run then you
> change the oil to put it back in the water? Or is it change the oil
> and run the engine then pull the boat, then run the engine after
> launch and change again?
>
> I would think changing it at mid season would be more useful and
> leave out the change and launch part. Mine floats all year so I just
> get the 2 changes in when I have time.
>
> Pat #130
>
>
> At 03:51 PM 1/18/2010, you wrote:
>> I think most manufacturers do not alter the change interval based
>> on the
>> type of oil being used. I have a diesel pickup, and the owner's
>> manual
>> states that the type of oil does not affect when it should be
>> changed.
>>
>> Bert
>> At Ease
>> #442
>>
>>
>> In a message dated 1/18/2010 2:50:12 P.M. Central Standard Time,
>> robert.seastream at comcast.net writes:
>>
>> I also considered using 'synoil' in my Yanmar, mostly because it
>> should increase the interval between changes. However considering
>> Yanmars' response included the comment "please continue to change it
>> at the recommended interval for your engine as specified in the
>> operator's handbook." and the higher cost of synoil, I see no
>> benefit
>> to its' use. I change my oil twice yearly (haulout & launch), and
>> put
>> 250 hours or less on the engine per year.
>>
>> Bob Seastream
>> Intuition # 906
>>
>>
>> On Jan 18, 2010, at 10:36 AM, <sail-ability at sympatico.ca> wrote:
>>
>> >
>> > I am a mechanical engineer with over 40 years experience in the
>> > automotive arena. Without getting into a long diatribe on the
>> > where's and whyfore's, one can never go wrong with the
>> manufactures
>> > recommendations for service intervals and fluid use. I've seen
>> many
>> > cases of destroyed machinery due to owners trying to second guess;
>> > it falls under the category of " if the book says one drop, then
>> two
>> > must be twice as good"! It doesn't work that way.
>> >
>> > Cheers
>> >
>> > JohnM
>> >
>> >> To: C320-List at Catalina320.com
>> >> Date: Mon, 18 Jan 2010 10:20:54 -0500
>> >> From: wflowe3 at netscape.net
>> >> Subject: Re: [C320-list] Yanmar 3GM30F - Synthetic - why not
>> >>
>> >>
>> >> Not that this has anything to do with our Yanmars, but I just
>> >> bought a new VW with a diesel and it comes with, and recommends
>> >> using only synthetic oil. Oil changes are recommended at 10,000
>> >> mile intervals. That said, I can't see any advantage to using
>> >> synthetics if it doesn't provide some measurable benefit.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: Pat Ireland <cherie320 at gmail.com>
>> >> To: C320-List at catalina320.com
>> >> Sent: Sun, Jan 17, 2010 10:41 pm
>> >> Subject: [C320-list] Yanmar 3GM30F - Synthetic - why not
>> >>
>> >>
>> >> All
>> >>
>> >> It's about time to change oil and I suspect that synthetic oil
>> >> should be a
>> >> better oil for diesels that standard petroleum oil. But the
>> manual
>> >> recommends not to use synthetic oil. Does anyone know why
>> synthetic
>> >> oil
>> >> is not recommended for a yanmar 3GM30F?
>> >>
>> >> In looking for data, I found this quote on a web search. It was
>> in a
>> >> thread about cold starting a Yanmar 2GM20.
>> >>
>> >>
>> --------------------------------------------------------------------------------------------------------------------------------
>> >> After receiving numerous different answers from Yanmars USA tech
>> >> support
>> >> (mostly IMHO run by local distributors who are selling *Yanmar*
>> >> non-synthetic
>> >> oil), I decided to write directly to Yanmar in Japan about the
>> use of
>> >> synthetic
>> >> oil ...... the following is the answer I received.
>> >> Mr. Guthrie,
>> >> Your Yanmar pleasure boat engine should be broken in before
>> using the
>> >> sythetic oil. As long as you have at least 50 hours on the engine
>> >> and it
>> >> has be used at all RPMs, then synthetic oil is OK to use. Please
>> >> continue
>> >> to change it at the recommended interval for your engine as
>> >> specified in
>> >> the operator's handbook. You can expect slightly increased oil
>> >> consumption
>> >> and posibly a drip or two under the engine. Synthetic oil tends
>> to
>> >> find
>> >> its way past gaskets and seals a little easier than petroleum
>> based
>> >> products. Depending on temperature, you can also use a petroleum
>> >> based
>> >> 10-30 or even a 5-20 if it is cold enough. Just be sure to use a
>> >> premium
>> >> grade oil.
>> >>
>> >> Regards,
>> >> Earl Helmer
>> >> Director, Service Warranty and Engineering
>> >>
>> >> ---------------------------------------------
>> ---------------------------------------------------------------------------
>> >>
>> >> Anyone have info that would dispute this information?
>> >>
>> >> Pat Ireland, Cherie, 801
>> >>
>> >>
>> >
>
> Pat Moriarty
> PSI Urethanes Inc
> PH: 800-888-5156 Fax: 512-837-8733
> Please visit our web site at
> www.psiurethanes.com
>
>
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