Kubota oil

[hagrid]

The smoking valve train story os not representative of teal life.

Teal life:

Google Image Result for https://www.allaboutbirds.org/guide/assets/photo/60292801-480px.jpg

images.app.goo.gl

 

[ejb11235]

La-da-da-da-dah It's the m*** teal double G

 

[Turfturd]

I would agree with lmicheal.
Oil is 1 of the cheapest types of maintenance and one of the most important.
When you mix brands and/or weights you are mixing and changing the additives that make it that “type” of oil. I would just bite the bullet and buy enough of one kind.

 

[RalphVa]

Here is a link to an array of calculators. Good or bad code they work and all you have to is plug in a couple values.

Calculators | Widman International SRL

www.widman.biz

Dan

Nice to see that they finally put the same stuff out for the public that I put together in the early 90s. At that time, the stuff I put together would have been proprietary. I've all the same tools as in the reference including a bunch more. Could model a whole lube oil processing plant to tell where it's limits were for certain feedstocks, etc. All kinds of tools for viscosity, VI, blending, etc.

 

[ejb11235]

Nice to see that they finally put the same stuff out for the public that I put together in the early 90s. At that time, the stuff I put together would have been proprietary. I've all the same tools as in the reference including a bunch more. Could model a whole lube oil processing plant to tell where it's limits were for certain feedstocks, etc. All kinds of tools for viscosity, VI, blending, etc.

Glad I have access to the code for the viscosity calculator ... I'm learning a software tool (r/shiny) and this gives me a simple calculator to mimic.

 

[ejb11235]

Ralpha--

I've been looking at your VB code and some of the other viscosity calculators out there. This morning I started writing my own version in R.

I have a couple of questions about the code you posted:

1) There's a comment in your code about calculating viscosity differently for cs values <2. It looks like it's not just a different constant, but a significantly different formula ... care to comment?

dVis = dVis - Exp((-0.7487 - 3.295 * dVis) + 0.6119 * dPt7Sq - 0.3193 * dPt7Cube)

2) I notice in a few places you use the EXP function, which calculates e raised to a power. This strikes me as odd because all of the logs are base 10. Is this an error or is this what you actually intended? Here are a couple of examples:

If dVis < 2# Then
  dCval = Exp(-1.14883 - 2.65868 * dVis)
End If

If dVis < 1.65 Then
  dDval = Exp(-0.0038138 - 12.5645 * dVis)
End If
...
dZval = dVis + 0.7 + dCval - dDval + dEval - dFval + dGval - dHval
astm_d341_vm = Log10(Log10(dZval))