[C320-list] Change oil?

[Doug Treff]

Here's my take on it. You can probably get away with skipping it, but is 
it worth saving $75 and a few hours of your time to risk an expensive 
rebuild or repower later? When you run an engine, acids build up in the 
oil. When the engine sits for long periods of time, those acids can 
begin to corrode the bearing surfaces of your engine. The oil change in 
the fall (or before any long layup) is one of the most vital things you 
can do to keep your engine tip-top.

You may not notice it right away, but over time, a little damage here, a 
little damage there, from taking these shortcuts, and you're doing a 
major overhaul at 5,000 hours instead of 10,000+.

Same with the impeller. Change. it. every. year. I never understand why 
people take shortcuts with such quick and inexpensive maintenance when a 
failure could destroy an engine.

Your call.

http://www.powerandmotoryacht.com/ask-professor-diesel/are-end-season-oil-changes-really-necessary

---
Doug Treff
September Song #350
doug at treff.us

On 2014-10-04 08:38, mcdonough5 at verizon.net wrote:
> After a season filled with repairs and maintenance and zero sailing,
> we’ve run our Yanmar (3GM30F) engine less than 15 hours total – and
> maybe not even that much.
> 
> Considering that, is it still necessary to change the oil and filter
> for winter storage?