Quote Originally Posted by Jimny4x4 View Post
Oils mentioned so far here - Ballistoil sounds the better - low viscosity and from memory its not a mineral oil .
Another poster said certain Mineral Oil which I always thought was a def No but if it works and TONY say's so.....
So what about WD40 .
Very easy application .
Lazy mode would be to squirt in thru the cocking slot , invert the airgun , with the transfer port blocked . Oil would settle around the Leather Piston Seal .
As its so viscous , absorbs easily into the leather and evaporates ... .
So no risk of combustion ?

I did hear /see the WD40 being used to quickly bring back a tired springer before .
Plus for the run in period you may get some vapourised residue down the barrel - gives it a clean in the process .
Ballistol is a mineral oil but unlike the pure mineral oil of the Bisley oil, it contains many other components.
Particularly cleaning acids. It would probably be ok.