Posted by showcrop on October 09, 2019 at 06:27:03 from (75.68.37.174):
This week's 303 vs. everything else oil debate is on the N forum. Bob's post got me thinking about moisture in oil or "milkshake oil" so I googled moisture in oil and found a revelation. Now this varies a lot by part of the country and type and age of tractor and how a tractor is worked, but I see a major side factor to what is best for an old tractor. Generally speaking there are two sides in this debate. Most posters say if something is cheap it is good for nothing, while a few say "hang on and look at some other factors".
What I found in multiple reports is that the absorption of moisture, and they appear to reference mostly moisture introduced by condensation as opposed to leaks, by oil is a big problem, but we already knew that. What is new to me is that the more additives that oil has the more the moisture will be absorbed into the oil, which of course is why UTF turns milky. Absorbed moisture, according to multiple studies results in oxidation, corrosion, reduction in lubrication ability, and partial blocking of filters. Posters here who ask about milky oil are usually told to change it and store their tractor inside, which of course does nothing to prevent moisture by condensation. I always advise them to work their tractor enough to turn the oil clear again. This all tells me that when the owner of an older tractor that has no clutch packs or wet brakes uses 303 they may get marginally less lubrication for the first month, but after that they will get more than they would have with the more expensive oil. Now of course the owner, if like 90% of the old tractor owners uses his tractor only occasionally, will need to periodically need to drain the water off the bottom, but at least this is possible with the 303 while impossible with the more expensive oil. So my point is that not only is the 303 suitable for the old tractors, It is actually better for the ones that get only occasional use.
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