seagull gearbox oil

[Loiner1965]

i know i should use 140 oil but i heard they was a grease you could add to sae90 to bring it up to 140 grade....does anyone know the name of this grease and mixing ratio etc.
i have lots of sae 90 at work so this might be a cheap option

[charlesp]

Get hold of some 140 grade oil. That'll be the right oil for the box, it'll form an emulsion with the water, and it doesn't involve guesswork.

[Loiner1965]

probably best to be honest but like others i do have a curiosity feature lol....is 140 the best or can you go heavier etc.....just wondering