Based on risk/reward, a wise choice. High potential risk; low reward.Ron
From: "Hoyt, Mike via CnC-List" <cnc-list@cnc-list.com>
To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com>
Cc: "Hoyt, Mike" <mike.h...@impgroup.com>
Sent: Sunday, July 23, 2017 8:06 PM
Subject: Re: Stus-List synthetic oil
Thank you everyone. We ran the engine a little over an hour and then at dock I
drained the synthetic and replaced filter and oil with the usual non synthetic.
I believe that a flush with clean oil in this manner is good for the engine
anyway
Mike
Persistence
Halifax
________________________________________
From: CnC-List [cnc-list-boun...@cnc-list.com] on behalf of Sam Salter via
CnC-List [cnc-list@cnc-list.com]
Sent: July 23, 2017 9:06 PM
To: cnc-list@cnc-list.com
Cc: Sam Salter
Subject: Re: Stus-List synthetic oil
The concern is that synthetic (with their detergents) will clean out the ring
grooves and cause excessive blow-by and increase oil burn.
Regular diesel oils - even single weight oils - have had detergent additives
for many years. Certainly since I was an apprentice (in the '60's). So unless
the Yanmar is pre '60's, I wouldn't be too concerned.
Most of this concern stems from gas engine experience, where detergent
additives came much later and there has been real experiences of gas engines
loosing compression after a change to synthetic.
Sam Salter
CandC 26 Liquorice
Ghost Lake Alberta
> On Jul 23, 2017, at 5:09 PM, Marek Dziedzic via CnC-List
> <cnc-list@cnc-list.com> wrote:
>
> Mike,
>
> There are some reports that synthetic oil may dissolve some of the residues
> left on different parts, which may lead to sudden increase of the oil usage.
> Of course, this applies to older engines. The general rule of thumb is that
> if you used non-synthetic oils in the past (and did it for years) you may
> want to stay with the same kind. If you used synthetics, there should be no
> issue switching to non-synthetic.
>
> My personal experience is limited to a single car in the past, where I
> changed from normal to synthetic (the car was driven hard) and I ended up
> with an engine that burned about 1-1.5 l (1-2 qt.) of oil for 1000 km.
>
> I don't believe that you could use oil that is "too good" for the engine. As
> long as it is the same grade, it should work fine.
>
> In your case I would monitor how much oil is staying in the engine (and how
> much you burn).
>
> Good luck
>
> Marek
> 1994 C270 "Legato"
> Ottawa, ON
>
> -----Original Message-----
> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Hoyt, Mike
> via CnC-List
> Sent: Sunday, July 23, 2017 11:45
> To: cnc-list@cnc-list.com
> Cc: Hoyt, Mike <mike.h...@impgroup.com>
> Subject: Stus-List synthetic oil
>
> I had my brother pick up 15w40 for me last week. Changed oil today and when
> old oil drained realized he bought synthetic 15w40. Have outing today and no
> time to get regular oil.
>
> Plan to drain and change later this week to non synthetic
>
> Is this an issue?
>
> Yanmar 3gm30f
> _______________________________________________
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> _______________________________________________
>
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_______________________________________________
This list is supported by the generous donations of our members. If you wish to
make a contribution to offset our costs, please go to:
https://www.paypal.me/stumurray
All Contributions are greatly appreciated!
_______________________________________________
This list is supported by the generous donations of our members. If you wish to
make a contribution to offset our costs, please go to:
https://www.paypal.me/stumurray
All Contributions are greatly appreciated!
_______________________________________________
This list is supported by the generous donations of our members. If you wish to
make a contribution to offset our costs, please go to:
https://www.paypal.me/stumurray
All Contributions are greatly appreciated!
