We reclaim heating oil at work. As people swap out their heating systems for propane we'll get 100 gallons here or there. Not enough to run anything too extravagant, but enough to run a small compressor for air!How does this work???
You have a well in your back yard?
My 8hp Yanmar surprisingly uses very little... but it is very, very loud for what it is.. it puts all the other machinery we have to shame.