Oil loading problem

[clif9710]

To augment the supply of oil in the old world, I set up an oil refinery and small oil harbor in the new world. That harbor is filling with oil. However, when I click on the regular harbor for the island, oil doesn't appear. When I attempt to set up a trade route to pick up the oil, again the oil doesn't appear from me to select it as cargo.

I have a road connection to the main harbor from the small oil harbor. The main harbor will not accept a railroad connection.

Any idea why the oil is not being recognized?

[Sage]

you have to have an oil tanker to ship oil and you ship it through the oil harbor. You need an oil harbor on both the island shipping and the island receiving.

[clif9710]

Thanks! It seems that tankers can't be put on a trade route, though I can't imagine why that is even if it can only carry oil. The lack of item slots is a disappointment. I have one that reduces maintenance expense by 40% just waiting to put in