Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 27-03-2011, 08:12   #16
Registered User
 
zeta's Avatar

Join Date: Dec 2010
Location: Murrells Inlet, SC
Boat: mt34dt
Posts: 308
Re: Yanmar engine oil vs generic

Delo 400, Rotella, Delvac, millions of over-the-road truckers can't be wrong and their engines see far more severe conditions than an occasional sailboat auxiliary. Just my 2 pesos.
__________________

__________________
zeta is offline   Reply With Quote
Old 27-03-2011, 08:27   #17
Registered User

Join Date: Feb 2011
Posts: 586
Images: 3
Re: Yanmar engine oil vs generic

The Yanmar service manual for my 3GM30F lists a number of brands of oil that are acceptable. I use Rotella just because I've used it in a number of diesel engines in the past with good results. Have used synthetic in a Kubota with no problem but I don't know if I'd use it in the Yanmar as synthetics are not on the list in the manual (which was probably written pre-synthetic).
__________________

__________________
smurphny is offline   Reply With Quote
Old 27-03-2011, 08:39   #18
Registered User

Join Date: Oct 2010
Location: Eastern Washington
Boat: Cape Dory 27
Posts: 13
Re: Yanmar engine oil vs generic

Quote:
Originally Posted by lockie View Post
Next step in my life-long quest to avoid paying through the nose for brand names.........

I'm sure I don't need to use Yanmar oilin my 2GM, but I'd like to hear from people who've successfully used non-Yanmar branded oils for a while.

lockie
Been using Amsoil synthetic for over 10 years. You can extend oil chages if necessary.
They reccommend AMSOIL Power Sports - Online Lookup Guide for Yanmar Diesels.
__________________
Music is offline   Reply With Quote
Old 27-03-2011, 09:10   #19
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Yanmar engine oil vs generic

Now I see this one Music and capngeo referenced is for pre 2007 engines.
The one I posted a link to is for post 2007 engines.

I think the OP is likely to stick with conventional oil considering the stated desire to use a qualified off brand, if I understand correctly. (Rotella 15-40 is readily available and proven)

For me, I think it's safe to assume synthetics are "as good" as conventional oils, at the least. With a couple of possibly distinct advantages, remaining cleaner during the interval and allowing a longer interval if circumstances come up to prevent an on time change, I could be swayed.

But, if it stays so clean where are the contaminates going? Do the contaminates come from combustion by-products, or from the breakdown of conventional oil?

What might be the possible down side of switching to synthetic after 1800 hours and many years using Rotella?

I've always thought the dirty oil is contaminated by carbon compounds(?) from the fuel burning.
__________________
four winds is online now   Reply With Quote
Old 27-03-2011, 16:11   #20
Registered User

Join Date: Feb 2010
Location: Melbourne
Boat: Compass 28
Posts: 297
Re: Yanmar engine oil vs generic

Thanks guys, heaps of good info there. Some more of my meagre dollars will now not be wasted merely for the sake of a name on a label.

Appropos: the little pipe between the fuel filter and injector pump sprung a dribble: $20 to fix at the local hose shop, versus around $80 for a genuine newie from the dealers here in Oz! Robin Hood rides again. Ha ha ha ha ha ha!!!!!!!!!!!!!

lockie
__________________
lockie is offline   Reply With Quote
Old 27-03-2011, 21:23   #21
Registered User
 
Khagan1227's Avatar

Join Date: Oct 2010
Location: Kansas City, MO
Boat: In the hunt again, unknown
Posts: 1,330
Re: Yanmar engine oil vs generic

Quote:
Originally Posted by four winds View Post
Now I see this one Music and capngeo referenced is for pre 2007 engines.
The one I posted a link to is for post 2007 engines.

I think the OP is likely to stick with conventional oil considering the stated desire to use a qualified off brand, if I understand correctly. (Rotella 15-40 is readily available and proven)

For me, I think it's safe to assume synthetics are "as good" as conventional oils, at the least. With a couple of possibly distinct advantages, remaining cleaner during the interval and allowing a longer interval if circumstances come up to prevent an on time change, I could be swayed.

But, if it stays so clean where are the contaminates going? Do the contaminates come from combustion by-products, or from the breakdown of conventional oil?

What might be the possible down side of switching to synthetic after 1800 hours and many years using Rotella?

I've always thought the dirty oil is contaminated by carbon compounds(?) from the fuel burning.
First, let me get the disclaimer out of the way and then I'll try to explain.

While I am a certified tribologist (I'll save you the trouble of looking it up: Tribology - Wikipedia, the free encyclopedia ), I do not work, nor am I affiliated in any way to a petrolium products manufacture, except as an end user and a PdM professional.

The advantages of syntethics over mineral oil aren't percieved, they are fact and backed up by every leading lubrication product producer with years of data to prove it. That said, let me explain in the simplist of verbage.

Syntethic oils are produced and blended with PAO (polyolefins). To put it simply, PAOs make syntethic oils more slippery and inprove the lubricating film properties. Since PAOs bond with the metal surfaces of your engine, there is little or no metal to metal contact and thus MUCH less wear products in the oil, which in turn means cleaner oil, and longer oil life. Additionally, most synthetics have better additives which reduce/remove water from your oil (minimizing corrosion) and clean the interior of your engine. Since your oil carries the wear products to the filter, and syns are easier to filter than mineral oils, that results in the contaminates getting left in the filter. Since PAOs help the oil bond with the metal, the interior of your engine remains coated with lubricant MUCH, MUCH longer than with mineral oils. This in turn means your bearings, etc remain lubricated longer and less wear when starting your donk after it has been sitting for any period of time. Another VERY important benefit of syn oil, it maintains it's viscosity over much larger temperature ranges than mineral oil. I.e. the synthetic oils will still flow normally even if the temperature is very cold or very hot.

There are two basic reasons you need to change your oil on a regular basis. Additive depleation and the oil viscosity has increased too much. As oil is used in an engine it gets dirty over time, dirty oil has a higher viscosity (thicker) than new clean oil.

There are other advantages, but again the major advantages are better fuel economy, less corrosion, cleaner oil, longer oil life.

Engines and rebuilds cost a lot of money, synthetic oil costs a few bucks (pounds, euros, etc.) more than mineral. Your call.
Khagan1227 is offline   Reply With Quote
Old 27-03-2011, 21:35   #22
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Yanmar engine oil vs generic

Thanks, that all seems reasonable to me.
__________________
four winds is online now   Reply With Quote
Old 27-03-2011, 23:01   #23
Moderator
 
Boracay's Avatar

Cruisers Forum Supporter

Join Date: Feb 2004
Location: Pelican Bay, Great Sandy National Park
Boat: Steel Roberts Offshore 44
Posts: 5,175
Images: 18
Castrol RX?

Unless my memory is playing tricks my friendly local John Deere dealer didn't stock the special John Deere oil. When I asked they suggested Castrol RX. Got it from my local Repco store.

Calling Castrol and asking for their recomendations would be a good idea.

It's my understanding that synthetic oils are not suited to some engines during their running in period.
__________________
Rust never sleeps
Boracay Blog.
Boracay is offline   Reply With Quote
Old 27-03-2011, 23:33   #24
CF Adviser
 
Bash's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
Re: Yanmar engine oil vs generic

I've had Yanmars on the last three boats, current boat included, and have had any number of certified Yanmar mechanics involved in servicing my engines.

Had a Yanmar mechanic ever showed up with Yanmar motor oil, I suspect I'd have fired him on the spot, if for no other reason than for wasting my hard-earned dollars.

Fortunately, I've never had a Yanmar-certified mechanic show such an extreme lack of judgment.
__________________
cruising is entirely about showing up--in boat shoes.
Bash is offline   Reply With Quote
Old 28-03-2011, 00:09   #25
Registered User
 
Dragon Lady's Avatar

Join Date: Mar 2010
Location: Sydney Australia
Boat: Lavezzi 40, Pourpre
Posts: 949
Re: Yanmar engine oil vs generic

The main advantage of synthetic oil is that it doesn't break down at high temperatures like mineral oils.
This is an advantage in high performance racing engines, but I'm not sure it's needed in a marine diesel engine.
Fortified mineral oils provide good value for money in medium performance engines ie unsophisticated race engines and top end road cars, but again a nice steady plodder like a marine diesel should be happy with a good quality mineral oil.
The reason oil gets dirty is due to the combustion gases blowing past the piston rings. That’s why a worn engine will dirty its oil quicker.
If you want to know what oil to use I suggest you call the tech expert at your favourite oil company, if they are a real expert and not a salesman they will tell you the best oil to use and most importantly why.
__________________
Dragon Lady is offline   Reply With Quote
Old 28-03-2011, 00:11   #26
Registered User
 
four winds's Avatar

Join Date: Oct 2010
Location: Wandering the US Gulf Coast
Boat: 78 Pearson323 Four Winds
Posts: 2,138
Re: Yanmar engine oil vs generic

Boracay said "It's my understanding that synthetic oils are not suited to some engines during their running in period." ___________

Also known as the "break in" period. I was going to mention this as well. The reason for this is the fact that the synthetics are so good at reducing friction that during break in the piston rings will not seat (seal) to the bore of the cylinder because so little wear is occurring.

The same thing is related to the oil change interval of modern gas and diesel engines with computer controlled injection (less unburned hydrocarbons blowing by the rings). Old gear heads like me always changed oil in about 3500 miles. I did this with a new car until I learned the recommended 6000-7000 mile interval actually will allow the rings to seat. My gas mileage rose by about 3mpg after I let the oil go 6000 miles and the rings finally seated at over 25,000 miles. This was reported to occur with US diesel trucks as well. Those reports are what convinced me to actually let my oil go for 6000 miles. With my Chevy truck now, I just wait till the oil change light comes on (about 7000-7500 miles) and change it then. Times have changed.

In fact, I believe BMW uses a break in oil before switching to synthetics in their program that provides free scheduled maintenance on their new cars.

I think synthetics have merit. It's just that I always have changed my oil regularly and could not justify the added cost in the past. Today the price difference is less.

I'm on the verge of changing my mind.
__________________
four winds is online now   Reply With Quote
Old 28-03-2011, 01:25   #27
Registered User
 
Ironhorse74's Avatar

Join Date: Dec 2010
Location: Vancouver Washington
Boat: Ed Monk designed 34' Sloop Second Wind
Posts: 400
Images: 1
Re: Yanmar engine oil vs generic

I love oil threads! I was a fleet manager for 2 different large trucking companies. If you travel the interstate highway system in this country, you see their trucks every day. Both used an aggressive oil sampling programing. Both regularly retired trucks with 300k plus miles on them, with the oil that came in the truck from the factory. Take that for what it is worth. Five gallon oil changes versus an oil sampling program, was a financial decision. More than welcome to chew on that one for a while.
__________________
Ironhorse74 is offline   Reply With Quote
Old 28-03-2011, 02:13   #28
Registered User
 
Dragon Lady's Avatar

Join Date: Mar 2010
Location: Sydney Australia
Boat: Lavezzi 40, Pourpre
Posts: 949
Re: Yanmar engine oil vs generic

Are you saying you ran 300K without an oil change?
Surely not?
I can see the benefit of oil sampling, it saves us millions on our engines
But we run gas turbines which never need oil changes unless something goes wrong.
__________________
Dragon Lady is offline   Reply With Quote
Old 28-03-2011, 03:13   #29
Registered User

Join Date: Apr 2007
Location: Australia
Boat: Farr37 - Southern Cross
Posts: 80
Re: Yanmar engine oil vs generic

Just put a new Yanmar 3YM30 in my boat and took the recomendation of an auto mechanic mate of mine (highly value his knowlege on all things mechanical..) who recomended Castrol Seamax Super Plus for the crankcase & Castrol VMX80 for the transmission. I puchased the required amount from him as I couldn't get hold of the small quantity needed for the Yanmar (min purchase 20lt drum!!). Also doubled checked on this site: Castrol Australia - NetLube

Yanmar mechanic turned up to commission the motor & said I should be using Yanmar supplied oil, but he didn't have any in his truck and was very reluctant to use the oil I purchased (I was unaware I had to use Yanmar oil - should have read the manual.... They didn't make a point of it when the motor was dropped in either and I would have purchased if I knew..) Anyway, he did a bit of googling on his Iphone and made a quick phone call, and said its OK to use, but not OK for the VMX80 for the transmission (had to use the Seamax).

Anyway - all still OK and after a grand total of 3 hours on the clock!! Can't believe how easy the motor is to start & quite compared to the old 4 cyl Sole..

btw - while talking about oils, I couldn't get over the sheer number of oil types for motor vehicles my mate has to keep on hand. I counted probably 8-10 44 gal drums of various brands/grades + as many if not more 20lt drums.. He said that just about every manufactuer specifies a different type of oil and even different types within brands/models. His is not a large business, with 5 or so service bays - so I would hate to see what large workshops would need to stock...
__________________
Spirit28 is offline   Reply With Quote
Old 28-03-2011, 09:47   #30
Registered User
 
Ironhorse74's Avatar

Join Date: Dec 2010
Location: Vancouver Washington
Boat: Ed Monk designed 34' Sloop Second Wind
Posts: 400
Images: 1
Re: Yanmar engine oil vs generic

Quote:
Originally Posted by Dragon Lady View Post
Are you saying you ran 300K without an oil change?
Surely not?
I can see the benefit of oil sampling, it saves us millions on our engines
But we run gas turbines which never need oil changes unless something goes wrong.
What I am saying is that when I was managing fleets we would retire about a quarter of the fleet with the original oil in the engine. 300k plus miles. These we were big fleets, one had over 6000 prime movers.

There is a huge difference in how we use our boat diesels. They sit for long periods of time. Tend to get condensate in them. Sometimes use poor quality, high ash content diesel.
__________________

__________________
Ironhorse74 is offline   Reply With Quote
Reply

Tags
engine, oil, yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Multigrade Oil in Yanmar 1GM Engine ? troppo Engines and Propulsion Systems 6 24-09-2010 16:23
Oil in Bilge..More Oil in the Engine! Cheechako Engines and Propulsion Systems 32 11-03-2010 13:45
Yanmar Front Main Oil Seal Slings Oil quartersplash Engines and Propulsion Systems 1 06-08-2009 11:26



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:55.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.