Diesel oil
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=26340
Printed Date: 31 Jul 2025 at 3:21am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Diesel oil
Posted By: ac.d17iv
Subject: Diesel oil
Date Posted: 26 Feb 2011 at 8:37am
I have a 185 now and I'm new to diesels engines. My manual says to use straight 30WT for oil, but it seems like a lot use 15W40. This won't run much in the winter and will mainly be used for show. What does everyone else use?
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Replies:
Posted By: Denis in MI
Date Posted: 26 Feb 2011 at 8:44am
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15w 40 is my prefered oil of choice for all of my tractors gas or diesel, working or show, winter or summer. I am a fan of it and haven't had any problems that I think it caused yet, I would have no fear using 15w40 in that tractor, it should give you more wear protection and easier cranking, but it is my opinion and I am sure some one else will have one too.
for what it is worth,
Denis
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1938 B, 1945 B, 1941 IB, 1949 C, 2 1938 WCs, 3 1950 WDs, 1951 WD, 2 1955 WD45, 1957 D-14
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Posted By: Gary in da UP
Date Posted: 26 Feb 2011 at 9:00am
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I swtched from Mobil Delvac 15-40 to 10-30 Delvac long ago for my Kubota and my powerstroke. Much easier cold weather starts. But you may not see the below zero temps that I do. I use it year round with no problems. 15-40 might be a better choice for a very hard working truck or tractor in 90+ temps, which we rarely see here for more than a few weeks a year.
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Posted By: ironac
Date Posted: 26 Feb 2011 at 10:58pm
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rotella 15-40 is a good choice two. also a good option if you just overhauled the engine.
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Posted By: farmer0_1
Date Posted: 27 Feb 2011 at 12:34am
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we always ran 30 wt in our mild climate delo 400 in all our diesels. no issues kept every one of them for years running great.
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