Yip.....simple pimple. Most any grease should work fine in the other parts but oil only on the ram.
I personally used dow 55 on my outer valve body and outer LPR core to keep the orings nice and tight but that's just me. Don't use it on moving parts.
Etek 3LT grey/black f/s
Valken Proton greyish/black f/s
68 4500 PE stubby, LP output f/s
68 4500 AIR tank(no reg) f/s
Creed Battery, eyes and noid f/s