I'm not sure if this suggestion will be well received, but it's been some trouble to me that there's no way to effectively use buildcraft oil with industrial craft machines without having some kind of power converter. At the heart of this suggestion is the whole request of providing the canning machine the support it would need to accept oil and fuel buckets, or link to a liquid transport pipe, so that we can in effect have a direct port of energy from buildcraft to IC2. I'm not sure as to the value in IC power that a single oil bucket would have but i would imagine that with a lesser energy cost even if you where to convert oil to have the same value as biofuel, and fuel to have the same as the coal produced variant, that you would still have a viable option.
A less viable option would be to allow the direct use of oil and fuel in generators, but i see that as a less perfect option as the generator would have no tank to store fuel oil.