BUT!!!!!! the ford 8n has run for 70 years on so called low quality oil and not failed due to this oil.
You missed the point of the article for older tractors totally.
second... 303 oils were compatible with early 60s and early 70s wet brakes and clutches and were better than the oils in the 1948 oils so again, tractors from the 60s, and up to 1975 have suffered NO failures due to 303 oils.. So we have 44 years of no failures due to 303 oils being used..... So your missing the point again on older tractors.
Thirdly 303 oils due to the original spec calling for whale oil additives for viscosity improvement over the 20 weight oils,, were banned in 74 due to the whale killing ban.... and the move last year to prohibit the use of a "303" labeled oil due to that 1974 ban, the replacement oil now on the market is jd20 spec which is even a newer spec oil than the previous 303 spec'ed oil. this means the cheaper oil is now good in even newer tractors into the 80's.
And back to the op article above, running any tractor with old or newer oil for long periods will help expel the moisture from the oil and boil it off.
Putting good "boots" over the shifters on some tractor will greatly reduce the introduction of moisture also.
However other than freeze damage from excessive water, most pre 76 tractors have not shown a huge problem from using early or late oils,, AND we have history to prove it. later tractors with 200 hydroshift gears are not including in this discussion.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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