Transformer explosions?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "S&JY" <youngsters-at-konnections-dot-net> 

Hi all,

I need some confirming wisdom from list experts.  I just completed a MOT
6-pack and filled the 3 dual-MOT containers (ammo cans) with transformer
oil.  I left about 1/2 inch of air space in each container.

Question:  will the oil vapors in the air be so concentrated that the
mixture cannot explode if a HV arc should occur in the air space?  I believe
this is the case, but I would like to hear from fuel combustion or
petro-chemical experts who know for sure.

Thanks,
--Steve Y.