Rotella T6 5W-40 for YM155D?

   / Rotella T6 5W-40 for YM155D? #11  
A synthetic 5W-40 diesel oil is going to work in almost any engine, especially one that has a few decade old spec of 10W-30 dino oil.
 
   / Rotella T6 5W-40 for YM155D? #12  
I’m in Southeast Louisiana. I have a newly rebuilt Yanmar YM2500 with the 3 cylinder Yanmar 3T80 diesel engine. It gets very hot here and the humidity is unbearable at times. I was going to use 15w-40 engine oil, until I did research online and found what Steve posted.

Here is notes that I’ve taken on what I’ll be using in my tractor:

Engine Oil:

-Shell Rotella T1 SAE 30 weight straight grade diesel engine oil

-4.5 quarts

-Sold at Walmart, Tractor Supply,
and O’Reilly’s


Transmission/Hydraulic Oil:

-21 Quarts, John Deere JDM J20C or
Yanmar TF500A. This is known as
Hygard. Aftermarket oil must “meet” JDM J20C specs, not be “compatible” with.

-Tractor Supply “Traveller Universal
Premium Tractor Fluid Trans/Hydraulic and Walmart “Super Tech Tractor Heavy Duty Transmission & Hydraulic Oil” meets JDM J20C specs.
 
   / Rotella T6 5W-40 for YM155D? #13  
Thanks for everyone who as posted on this subject. I have been using Rotella T6 5w40 for the last several years in my YM155d, YM2210d, and YM1510d. I have not had any issues that I know of, but I don't want to have any either. I know 40wt oil will protect better at higher temps but if it retains more heat I really don't want to have any head issues or issues with oil feeding if it is to think for the passages. I will probably switch my tractors to T6 10w30 from now on.
 
   / Rotella T6 5W-40 for YM155D? #14  
Last weekend switched to SAE 30W. Temps this week are pushing well into the upper 90Fs. It was so cool until this weekend. One of the coolest first half summers in a very long time here. It was rather very enjoyable.
 

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