[QUOTE=angrybear;7046416]
Quote Originally Posted by brassbanjo View Post

Although I would think it would be OK to use the same silicone-based grease that Hill does.

Pse don't use 3-in-1 in these high pressure pumps, it could be very dangerous![/QUOTE]

Please explain why

A normal mineral oil would be dangerous if used with high pressure &/or pure Oxygen, but poses absolutely no risk what-so ever with compressed air.
? what is the difference between "high pressure" and "compressed air"? all these pumps produce highly compressed air, which in the presence of a fuel (such as mineral oil)
is quite capable of sustaining combustion. It does not need to be pure oxygen, no?