Favorite oil for Yanmar 150HP engine ?

[baz]

Curious to know what people are using for oil changes such as Brand and type designation. Do some use synthetic oil?

 

[captd]

10W40 Rotella, best there is for diesel

 

[Levitation]

Rotella guy here, also... Use it for dozers, back hoes, trucks, and my boat...

denny-o

 

[Snug Tug]

Which Rotella? Here in PA and NJ I've only seen the standard Rotella T 15W40 in the white container and the synthetic 5W40 in the blue container. Both seem to meet diesel specs. The post above mentions a 10W40 also??

 

[Levitation]

For diesel engines:

Rotella-T 15W40 CJ4 - petroleum base
Rotella-T 5W40 CJ4 - synthetic base

I use the petroleum base on all my equipment...

denny-o

 

[captd]

Error on my part it is T 15W40. Just had my truck done yesterday. In tests, Rotella bring up oil pressure on older engines by up to 10 lbs. An expert gave me the the specs on this oil years ago. You find it every where. All truck stops , Wall Mart, Ect.

captd

 

[oldrt]

Gentlemen:
I do not own a Yanmar 4BY2-150 engine at this time but I am in the midst of researching the advantages between the Yanmar and the Cummins MerCruiser QSD2.0 -150 that was used in earlier models of the R-25. The Yanmar is really a BMW motor Yanmar marinized for boat use. It is an awesome design, but as all engines they have their own quirks. If you look at page 25 of your Operation Manual you will find that Yanmar is very emphatic about the type of oil that is used in this motor.
Engine Oil Specifications
Use a full-synthetic long-life engine oil that
meets or exceeds the following guidelines
and classifications:
Service Categories
• API Service Categories SM, SL, SJ, SH/
CF and CF
• ACEA Service Categories A3, B3 and B4
Definitions
• API Classification (American Petroleum
Institute)
• ACEA Classification (Association des
Constructeurs Européens d’Automobilies)


Also on the following pages in the manual there are several pages of approved oils that have the BMW Long Life 01 or 04 approvals. (04 is higher rated oil than 01) The bottom line is this the only oil that is really available is from a BMW dealer 5w-30 or Mobil 1 0w-40 for European vehicles, this oil is available at Pep Boy, Advance Auto and others.
If you research more you will find that you need to use a full synthetic BMW long life either 01 or 04 to comply with Yanmar’s oil specs.
Shell Rotella T-6, T-5 or Valvoline Premium Blue (full synthetic) is not rated with BMW’s long life rating.
If you have an oil related failure Yanmar could take an oil sample to find out if you have the correct oil in the engine.
http://www.yanmarmarine.com/theme/yanma ... 3OCT09.pdf
Just my 2 cents.