OK, Richard, I'm in.
Oil:
You can never be wrong following the manufacturer's recommendations
(Yamaha). The biggest advantage of the new synthetic oils is longevity.
Most of us change the oil and filter every fall and put very few hours on
our engines. Therefore, longevity is not that important. Of course, yeah
I know, there are other advantages of the synthetics, but the
manufacturer's recommendations are king and therefore I use their
recommendations. When synthetics first came out, some manufacturers would
void your warranty for not using the recommended lubricants. I use
synthetics in my cars, but they were designed for them.
Filters:
Again the manufacturer's recommendations should be followed, but most
of us do not put anywhere near enough hours on our auxiliaries to warrant
changing the filter more than once a season.
Recommendations:
Yanmar recommends changing the oil every 100 hours and the filter
every 300 hours for a GM or HM engine. Shell Rotella is one of the oils
they recommend. Otherwise, change oil and filter every fall, so the acid
and moisture-laden lubricants from the summer don't sit in the engine all
winter. Save your money for a good glass of bourbon. That's what I do.
All the best,
Gary
S/V Kaylarah
'90 C&C 37+
East Greenwich, RI, USA
~~~~~~~_/)~~~~~~
On Tue, Sep 3, 2019 at 9:28 AM Richard Bush via CnC-List <
cnc-list@cnc-list.com> wrote:
> Ok; respectfully.... you guys now have me totally confused...what one
> swears by, then other would "never" do....we mere mortals, (as in not
> mechanics, scientists, or otherwise experts in the field), need to know
> what we can reliably do for our good old Yanmars...
> so, can I use Rotella for diesel, (30 wt per C&C manual) or not...and even
> if not required, does it hurt to change the filter every year whether need
> or not...?
>
> Many thanks and please know that I, for one, love to see and partake in
> this kind of discussion, I just need to know what to do...
>
> Richard
> s/v Bushmark4: 1985 C&C 37 CB; Ohio River, Miel 584.4
>
>
> Richard N. Bush
> 2950 Breckenridge Lane, Suite Nine
> Louisville, Kentucky 40220-1462
> 502-584-7255
>
>
> -----Original Message-----
> From: Andrew Burton via CnC-List <cnc-list@cnc-list.com>
> To: cnc-list <cnc-list@cnc-list.com>
> Cc: Andrew Burton <a.burton.sai...@gmail.com>
> Sent: Mon, Sep 2, 2019 10:12 am
> Subject: Re: Stus-List engine oil
>
> For what it's worth, I use non synthetics oils and I wouldn’t think of not
> change the filter with each oil change. When I installed the new engine in
> my 40 two years ago I asked the mechanic about using synthetic oil and was
> told absolutely not! For the reasons already explained here.
>
> Andy
>
> Andrew Burton
> 139 Tuckerman Ave
> Middletown, RI
> USA 02842
>
> www.burtonsailing.com
> http://sites.google.com/site/andrewburtonyachtservices/
> +401 965-5260
>
> _______________________________________________
>
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