Finally dried up the oil spring. Was able to convert it and transport it all to two storages tanks "one in the tree house and one along the rail for the quarries"...
Total Amount Of Fuel Left:
3,770,454 MB
Or
3,700 Buckets Of Fuel
3,700 x 83 = 307,100 Minutes Of Fuel In A Combustion Engine
Or
5,118 Hours Of Fuel In A Combustion Engine
I don't think I'll be needing fuel for a while... Even if I'm using 6 Combustion Engines to power 4 quarries and 10 water pumps...