(quoted from post at 21:03:57 11/06/14)
(quoted from post at 01:10:37 11/07/14)
(quoted from post at 19:18:43 11/06/14) I must have missed something-I don't think he put 90
wt gear oil in his engine..
Read it again starting with the quoted text. My point was you wouldn't put gear oil in an engine so why would you think engine oil was good in a differential.
TOH
John(uk),Samn40,and others have all said that Ferguson had recommended using engine oil in cold climate and they use engine oil with no problems.John is a retired Ferguson mechanic and these are his words from another post.
Hi Mike,I don't know what the climate is in Kentucky so I mentioned it as a general option as some do prefer a Multi-grade. But Multi-grade in the transmission will be just fine in there. I queried all this with Castrol Oil sometime ago as we have a lot of tractors operating in cold climates and it does cause problems, I don't mean to say Kentucky is cold, I am just generalising. Castrol told me that the Multi-grade does not have all that much detergent in it and is entirely suitable for our purpose. It is also much better over a larger spread of temperatures as it will be thinner when cold and at least as thick when hot than the GL1. Of those who have changed to the Multi-grade and I have asked them have they noticed any difference in performance every one has said other than the hydraulics now work when it is really cold and they don't have to wait or wait as long for them to warm up the answer was no and everything was just fine. Being as it was something for the guys who operate in very cold conditions, it wasn't just for the USA I asked this, it was for world wide use (Canada and Scandinavia in particular) Apparently all oil has some detergent in it now they told me, the blend of the oil is quite different from how it was originally. I think that having too much detergent could arise from filling up with a Diesel engine oil(which often happens) not from the Multi-grade. If the oil is changed as it should be (every 720 hours) we would have less problems with sludge etc, they say that the oil should be changed every 12 months or 720 hours whichever comes first, just standing the oil deteriorates (like cooking oil does I suppose)Multi-grade does not have as high a content of detergent as we all thought so Castrol Oil told me and it is perfectly safe for use in the Hydraulic system, the problem wasn't so much the detergents in the oil but that the sulfurous content of EP oils that will corrode the yellow metals that make up the shims, bushes and bearings in the back end but even after all the talking we have done about this problem we still get people filling up with EP type oils, I suppose that because they are filling up a Gearbox and a Rear Axle they don't think about the Hydraulic system that also uses the same oil. The numbering of the GL1-90W oil does not help either, some seeing that immediately think of a very heavy and thick oil. I do know that some of the guys on here don't approve of the Multi-grade being suggested as a substitute but the original GL1 oil was specified over 60 years ago, I am sure that there have been some improvements in the oils since then and to our advantage as well especially for those in cold climates...but having said all this, anyone can use whatever oil they want in their tractor all that we can do is offer suggestions and give a good reason for change, making sure that whatever advice we give is correct. No-one is being forced to change and the original spec of the GL1 isn't carved in stone so it can never be altered under pain of death. When I was working on the tractors as long ago as 1955 we had a Multi-grade oil that we used in the Hydraulics because of slow response in our climate in the UK,which isn't particularly cold, dropping a tipping trailer took ages if you didn't use it and we never, ever had any oil related problems through using it. The Oil was given the official blessing from Coventry and I guess they must know a thing or two about their own tractors. I had some reservations at first about using Multi-grade in these old tractors because of all the sludge in the bottom, but when they said that even the so-called straight mineral oil has some detergent in the blend now, then there can't be much, if any, difference between the oils as far as detergent properties are concerned, you just need to change the oils at the specified intervals to help prevent sludge.
