I'm loving this mod, but I'm very clueless on oil. Do you have to find it? Pump it? I don't even know where to begin looking.
If you're looking for a different way to get to the same end result, try making a Steve's Cart with a woodcutter plus solar and coal engines (you need coal because the cart can get stuck under leaves and run out of power). Then set it up on a little circular track on dirt where it drops the wood, apples and saplings off in a Cargo Manager and gets piped to your other machines/chests. You could also automate a furnace to periodically produce charcoal from a bit of the wood to power the cart, but I haven't bothered because a few stacks of fuel will last for many days.If you are too entrenched to move and can't find oil, you can make some. Biofuel can be created in forestry mod. It's a bit of a build, but pays off. Make an arboretum for trees and pile in oak saplings, I find them best. You will soon have a tsunami of wood, but its the excess saplings you need. Take the saplings and dump them into a fermenter with appetite making biomass. Then pump the biomass into a still and get biofuel. It will power the combustion engines that need oil/fuel to run. It's slightly less efficient than fuel on a bucket to MJ basis, but its easily farmable.