What would cause diesel in the tank to be dark?
I am changing out a fuel tank and noticed the diesel is dark colored and smells like motor oil. Is this likely to be from blowby? The engine was recently rebuilt, but has used lots of oil ever since. I forgot to look in the tank before the shop closed and have never cut a filter apart so wouldn't know about the possibility of algae or asphaltene. The oily smell made me think of blowby, but wondered what else it could be.
Is this a worthwhile discussion?