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Farmall & IHC Tractors Discussion Forum
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SAE 30 vs. 15W40

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John in Penn

05-27-2007 07:54:22




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I have a IH 364 Diesel and I was wondering what oil to run in it. The manual says SAE 30 but I have been told to use 15W40. I have SAE 30 in it now and the oil press gauge reads about 1/3 the way up at 1300RPM




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Jim Allen

05-27-2007 11:48:12




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 Re: SAE 30 vs. 15W40 in reply to John in Penn, 05-27-2007 07:54:22  
FWIW, going from the IH SAE 30 to Rotella-T 15W-40 was partly responsible (at least 50 percent or more) for significantly reducing oil consumption in my 8200 hour 826D (D358 German). It has given me back some sterling oil analysis reports as well, one of which was posted here late last year if you want to search. I wouldn't be the least bit shy about 15W-40 or even 10W-30 in any diesel engine reated for straight 30. I just began using Rotella 10W-30 in some of my other diesel tractors and equipment, most importantly the stuff that has to start in the winter (which the 826 does not).

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CNKS

05-27-2007 08:27:16




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 Re: SAE 30 vs. 15W40 in reply to John in Penn, 05-27-2007 07:54:22  
Use 30W if it never gets below freezing, 15W40 if run in variable temperatures. But, I see no disadvantage at all to 15W40 unless it gets VERY cold. In any event, use oil with the diesel spec on the can.



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Hugh MacKay

05-27-2007 12:59:40




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 Re: SAE 30 vs. 15W40 in reply to CNKS, 05-27-2007 08:27:16  
CNKS: Very cold must be colder than I wish to tolerate any more. I've used 15W-40 in everything from SA to 1066 at minus 30-35 F. The 1066 did need block heater at those temperatures, but I had a 404 cubic inch Deere would fire right up at -35F with a wee shot of ether in the manifold injection and with 15W-40 oil in the crankcase.

At our ages, if get much colder than that, we're best off by the fire side.

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CNKS

05-27-2007 14:48:50




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 Re: SAE 30 vs. 15W40 in reply to Hugh MacKay, 05-27-2007 12:59:40  
I knew you would respond, that is why I put the very in front of the cold. I have seen -35 one time (that was enough for me), that was in Goose Bay Labrador when I was in the USAF. That is also cold enough that farenhite and celisus are the same, I think. Cold enough anyway.



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Hugh MacKay

05-27-2007 16:09:57




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 Re: SAE 30 vs. 15W40 in reply to CNKS, 05-27-2007 14:48:50  
CNKS: Minus 40 is the same on both scales, I've only seen it twice in my lifetime. That was in Nova Scotia, once in 1956 and again in 1996. in 56 my dad and I hoped the 300 wouldn't start, although we did need it back at farmstead as snow was in the forcast. It did start and guess who got to drive it the half mile back to farmstead. In 1996, I wanted my 6.2 diesel to start and it wouldn't, cord to block heater was broken. The 6.2 had no oil leaks, thus I put a cast iron fry pan full of charcoal under the oil pan. By the time the charcoal burned out it started like summer. So there you have it, 6 volt starts at -40 and 12 volt doesn't.

In Nova Scotia we quite regularly saw -30 F, -35 F quite unusual, -40 once every 40 years. I had a cousin stationed at Goose Bay with Canadian Air Force in the 40s, it's cold up there but not as cold as much of Canada on that same parallel. The old North Atlantic has quite and impact on east coast weather, takes all winter to cool it down and all summer the heat it up again. Falls are very nice dowm there, but we called spring 6 weeks of good sleding plus 6 weeks of rough sleding.

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CNKS

05-27-2007 19:28:17




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 Re: SAE 30 vs. 15W40 in reply to Hugh MacKay, 05-27-2007 16:09:57  
Yes, I checked that -35, and found it is -40 on both scales. I'm too far north already. In Labrador, we had snow flurries on the 4th of July. Most of the summer was "warm" though. I don't think the climate differs much from Maine.



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Hugh MacKay

05-28-2007 03:03:38




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 Re: SAE 30 vs. 15W40 in reply to CNKS, 05-27-2007 19:28:17  
CNKS: Northern Maine and NB can get just as cold as Goose Bay at mid winter, however they will have a much longer spring, summer and fall. Those ocasional snows on the east coast are all hinged to ice flows out of the north in spring, and most of that ice is breaking up off the coast of Labrador, and around offshore islands. As it flows south it melts. One of the unique features down east, there is no prevailing wind. Then you consider the Atlantic is still 32-35 F by the 1st June. If we happen to be getting west winds off the continent, it keeps the drift ice offshore, continental air melts it faster, thus the ocean warms faster. Problem is the wind can change very quickly to an east wind which pack all the coastal inlets and harbours with drift ice.

I've seen Sydney NS harbour full of ice on the 3rd of June, however bear in mind they have very likely had 60-70 days of above freezing temps by that time, 30 days of it probably above 55 F.

I remember once near end of April, talking via phone with a guy from here in London ON. He asked what April weather was like in NS. I said, "depends on which way the wind is blowing, west wind will give us a nice continental April day, and an east wind just remember the Atlantic is still very close to 32 F, and it can be damn miserable.

On May 9th 1972, I was putting up fence, in shorts, no shirt, etc. On May 10th we awoke to a foot of snow, that was all gone by evening, and two days later I was planting corn.

No, it wouldn't be fair to compare Maine or Maritime Canada weather to Goose Bay.

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CNKS

05-28-2007 06:47:28




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 Re: SAE 30 vs. 15W40 in reply to Hugh MacKay, 05-28-2007 03:03:38  
When you are in Goose Bay for 15 months (two winters) as I was, I knew it was going to be cold and got on with my life. I am from south Texas, did my basic training in San Antonio, Tech school in Wichita Falls, TX, training on the particular aircraft in Orlando, FL, then they sent me to Goose Bay at the end of December. Had to do a very rapid adjustment!



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Hugh MacKay

05-28-2007 08:51:58




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 Re: SAE 30 vs. 15W40 in reply to CNKS, 05-28-2007 06:47:28  
CNKS: Very understandable, rather a sudden adjustment on one's anatomy. We get that quite often here in Canada with the snowbirds going south for their winter vacation. A group near me spent Jan 07 in Florida, while they were away the temps hovered around the freezing mark. The night they came home, was a blizzard and temps dropped to -25 F. I've always said, no south for me until I can afford to stay all winter. May as well miss the bad with the good.

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georgeky

05-27-2007 07:59:01




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 Re: SAE 30 vs. 15W40 in reply to John in Penn, 05-27-2007 07:54:22  
You will get different reports, but either is fine.



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