(quoted from post at 19:09:28 11/24/19) A retired MF mechanic (Big Dean) said that the company put out a service bulletin that recommended 10W-30 in pre-1964 tractors. That's what I use in my 202 year round.
Most documents say that 10W-30 is good to around 0 degrees so unless you'll be using it in temperatures below 0 you should be ok with 10W-30.
(quoted from post at 05:20:27 11/25/19) I'll probably get reprimanded for this but I use whatever is on sale. All oil is made in just a few refineries same as gas and diesel fuel.
This is according to an Exxon Factory Rep that used to service the paper mill where I worked for 30 years. He also told me that diesel fuel
and #2 heating oil come from the same process. The red dye is added to #2 so trucks and over the road vehicles can't use it without risking a
heavy fine if caught. Up here in Maine when the State Police pull a truck over the first thing they cheek is fuel.
(quoted from post at 21:28:56 11/27/19)
Oil grades seems to be one of the most misunderstood. Multi grade oils have pretty much replaced straight grades eg. sae 20. Multi grade oils is identified by the w in the number eg 10w30. The multi grade is explained as this for 10w30 the w stands for winter so in cold temps the cold oil will be no thicker then a sae 10. When the oil heats up and thins out the oil will be no thinner then sae 30. This is how you get multi grade essentially it acts like two different oil viscosities in one. So if your tractor calls for a sae30 and you live in a area that sees some cold temperatures you would want to use a 5w30 or 10w30. If you are in a year round warm climate you could run a sae 30.
Basically if your tractor is a diesel I would recommend 15w40 which is a pretty standard diesel engine oil grade. If your tractor is a gas I would recommend 5w30 or 10w30.
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