Oil change WD45
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=189031
Printed Date: 31 Oct 2025 at 6:29am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Oil change WD45
Posted By: Ed (Ont)
Subject: Oil change WD45
Date Posted: 21 Jun 2022 at 7:26pm
Did an oil and filter change on my old tractor. Doesn't get used much so has been a few years since I did it. Used Shell rotella 15-40 but the older spec oil in the black pail. New filter from Agco. Really brought the oil pressure up - now constant on the high end of the gauge. Stays on the "L" in normal on the face of the gauge. It had 5-40 synthetic in it before and the pressure wasn't as good. I think the non synthetic is better for these old girls! Winter starts may be a bit harder tho. 
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Replies:
Posted By: exSW
Date Posted: 21 Jun 2022 at 7:44pm
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Use that oil in my WD. Fires up just fine in the cold. ------------- Learning AC...slowly |
Posted By: Aaron123
Date Posted: 22 Jun 2022 at 6:54pm
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I use Rotella 15-40 in my wd45 and it seems good. The guy that owned it before me put it in most engines he has.. they even put it in there dodge minivan. Lol |
Posted By: SteveM C/IL
Date Posted: 23 Jun 2022 at 6:24am
| Wally world 10-30 full synthetic in my 45 |
Posted By: Robert Musgrave
Date Posted: 23 Jun 2022 at 9:54am
| Dad's 1949 WD spent its first 40 or so years using SAE 20W-20, now has 10W-30. As far as pressure, the book says that "oil pressure is sufficient when the needle on the gauge is between the O-R-M in the word "Normal" on the guage! O, for the sake of simplier times! R. Musgrave |
Posted By: Tbone95
Date Posted: 23 Jun 2022 at 11:31am
| You went from 5 viscosity at start up, to 15 viscosity at start up. Yep, your oil pressure will be higher. |
Posted By: Ed (Ont)
Date Posted: 23 Jun 2022 at 9:22pm
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I'm not talking about startup. That is fully warmed up to about 170 degrees F. Drove it a few miles. Top number is what counts when it is hot - both are 40 so should be close.
Engine is 226 gas just to clarify. It stays at 170-175 constant even on hot day. Not trying to start any argument here. Just sharing some observations as the oil discussions seem to appear here once in a while.
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