O
ollytheosteo
Guest
![GI Team Colors](https://i.imgur.com/St7FKkA.gif)
A little grease on the tank o-ring won't kill anyone
but better to use a synthetic grease as opposed to a petroleum based product like Vaseline. Which you just happened to have lying around........
You have to avoid any lube around the fill nipple but a little synthetic oil or grease on the tank threads won't hurt.