Bill: Do you remember how much oil you put in your batteries. Was it the recommended amout on the container.
The OOB bottle was 250 mL (8. 45 oz) which makes each portion about 1. 4 oz per portion. However, all of the bottles I received were not full and the top portion was about one half what it should have been. I think on the standard size of batteries like the group 27, the portions are about right, at least to start.
I think I will use the mineral oil in my big tractor battery and bring it up to about 1/16 inch. But first I will mix some OOB with the mineral oil to check on the compatability.