Subject: Re: Oil additives
Hi Laurence,
I use Penrite GB40 gear oil which is a 25w75. I think the important point is regular changing. The box only holds about 3 litres so it’s pretty cheap. Just awkward to get to the filler.
The only problem I see with modern synthetic oils is that the various additives could well include cleaning chemicals such as chlorine (bleach)which could harm bronze bearings.
David