Webley oil for metal piston seals?

[45flint]

Reading my Webley Mark II Target has metal piston rings and Webley had one oil for leather seals and one oil for these metal ones. What are current recommendations I use SAE30 ND is all my old guns?

[Troubledshooter]

'Weboil' is SAE 30 oil and was recommended for air pistol lubrication, so carry on using your current oil for your Mk.11 Target. I use this oil for the Mk.1 and Mk.11 Service air rifles as well.
'Weblube' is synthetic oil as recommended for later air rifles.

[SRV1]

I just use a straight SAE30 mineral oil in my Service Mk2, a couple of drops now and again through the cocking slot to the piston head seems fine on it.....Easily obtainable from those outlets that sell petrol mowers....