On an occasional use high dollar tractor, once a year at least, regardless of hours.
On my newer Kubota, I change it twice a year, as I use it year round.
With the weather here ranging from -10 degrees F to 90 plus degrees......takes different weights to keep it happy, according to the manual.
Oil is a thing I never think about cost....just the way it is.
(I do strain the lightly used oil out of the Kubota to use in whatever other junk I'm working on....tired engine smoker, flushing oil, spray down a trailer deck, etc)
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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