I have a Yanmar 2GM and I just buy a top quality 30W regular oil which
is what Yanmar recomends. I also use a Yanmar filter but have also
used FRAM.

"Ringmaster" wrote in message
ups.com...
I have a Yanmar 2GM and I just buy a top quality 30W regular oil which
is what Yanmar recomends. I also use a Yanmar filter but have also
used FRAM.

Is 30W for the engine?
Here's what the paperwork I have says:

Selection of Engine Lube Oil: API: CD, SAE Viscosity: 15W40
Selection of Oil for Marine Gear: SAE Viscosity: 30
Sail Drive: Viscosity: 90 or 80W90

Scout

from Yanmar manual;

use oil with a rating higher than SAE class CC

oils they recommend;

below 10*C --------20-30*C
Shell Rotella 10 - 20 -------30
Mobil Delvac 20 -40-------30
RPM Delo Marine Oil 10 -20 -----30

Do you want to borrow my manual?

SBV


"Scout" wrote in message
news
"Ringmaster" wrote in message

ups.com...
I have a Yanmar 2GM and I just buy a top quality 30W
regular oil which
is what Yanmar recomends. I also use a Yanmar filter
but have also
used FRAM.

Is 30W for the engine?
Here's what the paperwork I have says:

Selection of Engine Lube Oil: API: CD, SAE Viscosity:
15W40
Selection of Oil for Marine Gear: SAE Viscosity: 30
Sail Drive: Viscosity: 90 or 80W90

Scout

Ringmaster wrote:
I have a Yanmar 2GM and I just buy a top quality 30W regular oil which
is what Yanmar recomends. I also use a Yanmar filter but have also
used FRAM.

I too have been using 30W. However its a real pain to change. I've
recently been talking to some motorcycle enthusiasts and they claim
that with the premium synthetic oils they need only change it every few
years - it just doesn't breakdown in the same way a normal oil does.
So the question is whether this is any this applicable to the yanmars?
A friend of mine speculated that with this type of diesel motor the oil
becomes contaminated more readily and thus would require changing
regardless.

Can anyone provide some insight?