anybody familiar with liquid-fuel camping equipment?

[Kali]

what KIND of oil do you use to oil the leather/plunger cup/whatever you call it?

I always just used vegetable oil because it was handy, but there is no specs anywhere on the colman instructions I can find, and I just bought a repair kit (yes $9 for a bunch of parts I don't need so I could get a new leather - thanks coleman or walmart ) and was curious.

[JustABozoOnThisBus]

1. Neatsfoot oil?

http://en.wikipedia.org/wiki/Neatsfoot_oil

Or any oil that's used for leather, if you have some for boots, belts, purses, etc. A couple of drops is plenty.

[hunter]

2. I've always just used mineral oil.

The kind I buy at the pharmacy.

I've used it on old-fashioned hand pumps too.

[Major Nikon]

6. That's what I use

Mainly because I always have some on hand and it won't go rancid.

[pintobean]

3. Palm oil

Oh... wait...
I'm thinking of something else.
Never mind.

[Moondog]

4. From the Coleman customer service site -

"Leather pump cups can be reconditioned by removing the pump plunger from the tank, spreading out the cup with your thumb and soaking the cup in a good leather oil such {as}, ball-glove oil, or mink oil for about 20 minutes. The soaking expands the pump cup allowing it to seal against the pump body."

[Hula Popper]

5. Any light oil

such as sewing machine oil, 3 in1 oils or fishing reel oil. Flattening the leather is a good idea. perhaps warming in a micro will also help.