This is a little hard to answer because you didn't state what type of air gun you are trying to oil. Is it a C02, Pump, Springer, Nitro or PCP air gun. But let me give some general rules. First NEVER use regular oil, it will eventually eat the seals. Only use air gun oil like Crosman Pellgun oil, RWS oil or other pellet gun oils. Regular oil is not good for airguns.
Oil the moving parts but don't over oil them and make them sloppy. there are some excellent videos on air gun care on the web I suggest to take a look. See the link below.
I would use Crosman Pellgun oil. Or RWS air gun oil.
Go to airsplat and you should find what your looking for. Or you could look up "air gun repair" on the web.
See the link below for the Owners Manual. It will tell you how to take care of the 347
Search the web. There are shops all over the place that modify air guns. (air gun repair). They modify the trigger and several of the internal PCP parts for more accuracy. A simple solution is to place a flat soft sponge and FEW drops of Crosman Pellgun oil in the bottom of your pellet tin. This will lubricate the pellet and the barrel, doing so will increase your velocity. Do Not over lubricate the pellets.
lets start with. Who made the rifle? there are over 100 different companies who have made air rifles.
You can still order 1077 parts from Crosman in New York. See the parts and owners manuals link below. Then contact Crosman Customer service and order your parts.
Crosman still has parts for this rifle. contact Crosman at the link below (Customer service) and order the parts you need.
it all depends on the condition of the rifle.
The Crosman 140 Air Rifle was made from 1954 to 1968 in four different variations. Crosman no longer makes parts for the rifle but you can still get it repaired. The Crosman home page offers a "Find a repair center" button on their first page. From there you can locate a center that has parts for your rifle. See the related link.
Crosman does. see the link below for the parts list and how to contact Crosman.
Crosman owns both the Benjamin and Sheridan line of air guns. See the link below for the Marauder parts list and the customer contact page for Crosman ( They sell parts for the PCP rifle.)
CROSMAN 2100 You can find CROSMAN Parts and manuals at ( see the link below) This should give you a diagram on how to dissamble a crosman 2100.