Originally Posted By: kschachn
Originally Posted By: BrocLuno
Do you use this thing when it's snowing or cold out? If not, I'd prefer a premium SAE 30 w/o and VII's at all and zero shear potential ...
Go read through the "Best SAE 30" thread and you will see evidence that straight 30's protect upper cylinder walls better than multi's. So, if you don't need a multi, don't ...
Is there something about this tractor engine that makes the upper cylinder walls susceptible to wear?
No, but it's many decades old. No point in not getting to 100 years old if possible. Just looking for best lubrication possible ...
That seems to be mono grades from what I have been able to find/read. So, if you don't need a winter grade multi (?), why use one.
I'll bet the original owners manual will spec SAE 30 HD, which is OK down to freezing.
Anything below that should be a multi ...