Quote:
Originally Posted by digitrc
The great thing about that oil is that you can get almost any weight you want just from the two basic oils.
If you start with the 20wt, but add an equal amount of 20wt - you get 40wt. Add the 10wt again and you've got 50wt!
And like you said, it is awesome value and will last a lifetime.   
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Well I had a bottle of 40wt, divided it into two bottles of 20wt.