Oil levels again ! 1934 RP

[Tony Griffiths]

Thanks the empirical experiment, Dave - most interesting. If the lowest gear in the train that runs continuously is one-third to half-submerged - as I suspect it would be with the 1/2 pint level - that would be sufficient to lubricate all box (as Dave's workshop walls and floors attest...). It would also give the lowest power loss - if you fancy a bit of competition use. Oddly, many machine-tool gearboxes use a relatively thin hydraulic oil, Shell Tellus, for example.