Author Topic: ISO 32 v ISO 68  (Read 950 times)

Offline Joules

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ISO 32 v ISO 68
« on: March 18, 2017, 06:50:15 AM »
This should be fun.....

What real PRACTICAL difference is there in running either of the above in a gear head machine.  I have my thoughts on this, but it's a question I have asked myself over many years and probably a good beginner question.

Also bear in mind for a new starter to machining the one oil might have to be a do all type choice.  My own opinion is if you need to use 3-1, then ISO 32 is probably a better choice.

Let battle commence.   :borg:
Just get doing and make swarf, you can decide what its going to be later.   :thumbup:

Offline chipenter

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Re: ISO 32 v ISO 68
« Reply #1 on: March 18, 2017, 03:15:54 PM »
Iso 32 as I get it for free  :thumbup:, plus it is clear and dosn't smell .

Offline John Stevenson

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Re: ISO 32 v ISO 68
« Reply #2 on: March 18, 2017, 03:27:35 PM »
I think it will have more to do with the machine that the grade of oil.
Differences between 32 and 68 as far as lubrication will be negligible, if it could even be measured.

Where it matters is size of the machine, does it live in a cold workshop for the winter months and questions such as this. The reason being 68 is a fair bit thicker and has more drag at low temperatures.

Used to have a Harrison 140 running on 20W motor oil [ everything ran on 20W motor oil seeing as he had a 900 gallon tank of it for the trucks ] and it wouldn't run the top two speed without a good 15 minute warm up at lower speeds and then it was fine.
John Stevenson