Posted by Rick Kr on October 10, 2010 at 20:23:56 from (67.108.90.72):
From the last post: I was running TSC 85w140 in a new 6 ft tiller and the oil had foamed.
Lots of people said just run it, its fine, others said get a better oil, TSC is cheap oil, some said synthetic.
I pulled all the oil out the gear box with a vacuum pump. Only the top 1/2 inch was foamed/bubbles. The rest of the oil looked fine. The side case, I pulled the drain plug and the oil came out good too. So I didn"t drain all of the side case.
I filled the gear box with new valvoline, and had to top off the side case with 12 oz. of valvoline. I then went out and tilled 3 acres at 540rpm on the PTO. A full 4 hours of running.
The results: Absolutely no foam in the gear box or side case. Both cases looked perfect without foam or little bubbles (air entrenchment).
I guess I am wondering does the valvoline and other better oils contain some sort of anti-foaming agents? The side case had 48oz of TSC oil topped off with 12oz of valvoline. Was the 12oz enough to stop the foam? I can"t think of another way to test it, 4 hours straight. I checked the temp of both boxes with my hand, neither was too hot to hold on to (yup, I shut off the PTO).
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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