I generally do the same for engine oil, hydraulic oil, filters and such. I went to the Kubota dealer for coolant as well, but what they sold me was a name brand diesel coolant, not Kubota branded. I used it with no problems, it's actually due for a change about now.I might pay a little more but I go to the JD dealer for all my maintenance items for my John Deere.
I am not a member and can not access pic. My deposits when dry look like wall joint compound and gritty, caukly
The Kubota dealer has never seen this type of coolant problem.
4 gals of it. applepicker