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OK to switch oil?


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#1 David Brown OFFLINE  

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Posted December 06, 2015 - 03:46 PM

I have this 1977 Satoh Beaver (the Beav) that dad bought brand new.  When he bought it, the dealer told him to use Rotella 15W40 diesel oil in it.  As a result, that's all we ever used.  I was changing the oil in it today and getting ready to put it away for the winter.  I do that because it never wants to start when the weather gets cold.  So I'm working away and I happened to glance up and notice a sticker ont he side of the fuel tank with oil specs on it.  Nowhere does it mention 15W40.  10W30 when it's real cold and all the way up to SAE 30 in the warm weather.  I can imagine that the tractor would start much easier if I used the other oil.  My question to all of you who have owned diesels for years is, at this point in time, would it hurt to drop the 15W40 and go with a diesel grade SAE 30?  The Beav doesn't have an hour meter so I have no clue as to how many hours are on this machine.  I'm kind of leaning toward it won't hurt but I thought I would ask to be sure.  It's not like I'm going from synthetic back to regular or anything.



#2 DougT ONLINE  

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Posted December 06, 2015 - 03:51 PM

The straight 30 will actually be thicker than the 15W40. The 15 indicates it flows like 15 weight and lubricates like 40 wt. the 10W30 might make it crank a little easier but I don't think you can beat the rotella in a diesel. It's lived this long with it, I'd keep using it.


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#3 JD DANNELS OFFLINE  

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Posted December 06, 2015 - 04:02 PM

I have found the 15-40 rotella to be more than adequate year round in my Ford 1500.
It starts fine in cold weather. I never even asked the previous owner what oil he ran?
I have lived far enough from town in the past, that you do not make a special trip to town because you a qt. Short of the right oil.
So run the same oil in my cars, GTs, rototiller and tractor.
When the specs were written, I wonder if multigrades of high quality was available in Japan?

Edited by JD DANNELS, December 06, 2015 - 04:11 PM.

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#4 chieffan ONLINE  

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Posted December 06, 2015 - 04:14 PM

When the specs were written, I wonder if multigrades of high quality was available in Japan?

Not only in Japan but anywhere.  The quality of oil has come along way since most of the stuff we run was built and they only specified what they had available to them at the time.  As long as you stay with a name brand oil I don't think you will go wrong.  Ford says to run only ours cause it has yellow cat P in it.  Gm says only run only ours as it has black cat P in it.  I run Northland as it don't have any P in it.


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#5 JD DANNELS OFFLINE  

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Posted December 06, 2015 - 04:27 PM

I have to add something here. Growing up my Dad swore by QuakerState 10/30 oil.
I worked 12-8 shift in a Standard Station on top of a hill just off I80 back in 1971.
Temp was around 20 below and the wind was around 30 mph at around 2:00 am.
A car pulled in and the guy asked for a qt of 10/30 Quaker State and a fillup.
Dropped the oil in sand went about filling him up and cleaning all the windows.
When I pulled the qt can out it was heavy? I could holt can over my head and it would not run?
Got a qt from the heated back room and put that in.

I could not help but wonder if bearings be oil starved until it warmed enough to flow?
Mind you, the oils we have today are miles better than what we had in the 70s!
And I have never had the 15/40 not flow.
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#6 jpackard56 OFFLINE  

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Posted December 06, 2015 - 04:34 PM

Rotella 15w40 is an excellent choice. Check your supplier though because Rotella and other top brands are now offering oils for the newer tier 3 and tier 4 diesels that have very similar names. My larger farm tractors are older and require more zinc than the newer engines require. My 2 Mitsibushi's and Kobota are all from 1976 thru 1987 and say the same as your Beaver, but Rotella 15w40 is all they have had since I bought them because that is what we use on the larger tractors and trucks.  I use the little Kabota in the winter for pushing snow, and ya like any diesel it is harder to start in the cold but as Doug T said the 30 weight will be even stiffer than 15w40. Good luck !


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#7 olcowhand ONLINE  

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Posted December 06, 2015 - 05:39 PM

15w40 is all I use.


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#8 Username OFFLINE  

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Posted December 06, 2015 - 05:50 PM

Different brands flow different when cold.This was a cold flow test that someone done on various synthetic oils.

 


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#9 Cat385B ONLINE  

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Posted December 06, 2015 - 06:18 PM

Different brands flow different when cold.This was a cold flow test that someone done on various synthetic oils.


Wow! I guess I'll stick with the Mobil 1 in the truck. Thanks for the video, John.
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#10 Marty'70 OFFLINE  

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Posted December 06, 2015 - 06:47 PM

Am I mistaken or does Shell Rotella make 10w 30 as well as straight 30 weight diesel oil now?
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#11 MH81 ONLINE  

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Posted December 06, 2015 - 07:04 PM

looks like Mobil 1 is something to consider.

I looked, they do have a 10w-40 Diesel Synthetic.

 

Why cant you switch back and forth Synthetic/non synthetic?


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#12 David Brown OFFLINE  

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Posted December 06, 2015 - 07:10 PM

Am I mistaken or does Shell Rotella make 10w 30 as well as straight 30 weight diesel oil now?


Yes, I'm using the 10W30 in my Massey. That's what it calls for.

#13 toppop52 ONLINE  

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Posted December 06, 2015 - 07:23 PM

The difference in the 10 winter viscosity vs 15, is not really noticeable south of the Arctic Circle. LOL Really, would not switch from Rotella in a diesel, it's the oil the vast majority of fleets run in their trucks.
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#14 JD DANNELS OFFLINE  

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Posted December 06, 2015 - 09:36 PM

My friend Woody had a 66 Ford 2 door sedan that needed a motor. About that time the Highway Patrol chased a stolen convertible up Hwy 117 till the guy missed a curve north of Mingo.
Woody bought that 428 ford engine and put it in his sedan. Ran real good, till he changed to Mobil 1 oil.
In 80 miles it leaked 4 qts of oil. That oil cleaned out all the junk and gunk.
Woody pulled it back out and replaced all gaskets, then it ran fine with Mobile 1.

Edited by JD DANNELS, December 06, 2015 - 09:39 PM.

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#15 adamjd200 OFFLINE  

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Posted December 06, 2015 - 11:04 PM

Yes Rotella makes a 30W, I use it in all my equipment, the truck has 5w-30 synthetic blend in it, I have had excellent luck with Rotella.  As a side note, we have always run 30w in the diesel farm tractors that we get in 5gal pails from the Case IH dealer with no issues.






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