Jr/Westpa said: (quoted from post at 23:10:28 06/15/10) Generally, I use 30 weight non-detergent oil in these tractors in the summer and 10 wt non-detergent in the winter. Can I switch to the 15-40 rotella for all round usage without harming the engines? It's about time for an oil change, so any suggestions would be appreciated.
Thanks in advance.
I have used Rotella Synthetic 5W-40 in my 1940 model H ever since I got it four years ago. Never a problem. I even added a quart of automatic tranny fluid to dissolve the gunky buildup inside the engine, then I just ran it for about a year and changed the oil and filter. Filter and oil was nasty, but I pulled the valve cover and the top of the engine was nearly spotless, so I pulled the oil pan and it was a little bit dirtier, but not much. Cleaned them both, scrapped off what I could reach and did it again. Next years oil change and inspection revealed the top of the engine was absolutely spotless, and when I had the front cover off to change the cam last week, (a lobe was worn off when I first bought the tractor), it was super clean as well. I also use the same oil in my all vehicles, the car, the trucks and the 4x4 that sits most of the time before I take it out and beat on it in the boonies for a weekend. Never had an oil related problem in anything I've used it in. Prior to using it though, I used the Rotella T 15-40 in everything, and never had a problem with it either.
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