Sorry it's taken so long to get back to you. I've just spent the last 48 hours trying to work out how to use my new laptop

I think it may be a sign I'm getting old when I'm challenged by technology.
Anyhoo's, I asked the nephew yesterday what sort of oil they use at the ARB they are at when they put lockers in cars, and he reckons they use Penzoil 80w90 LSD oil.