Most large oil tankers simply carry the oil from one port to another or from an offshore installation to a depot.
Any kind; tankers carry crude oil and oil products. Tankers that carry oil products are often called product carriers. Specialist tankers carry vegetable oils, sewage and water. Not all at once of course!
Some super tankers can transport 2,000,000 barrels of oil.
No, crude oil is transported into the US via pipelines or by massive oil tankers also known as "supertankers."
a tanker
Usually they carry crude oil. In general they are built to carry bulk liquids
4 or 5$
Road tankers are large lorries that carry large tanks that can hold bulk liquids or powder. A milk tanker will carry milk. And an oil tanker will carry petroleum products - petrol, diesel, oil, etc.
designed to move oil around the world
About 950
Oil tankers vary in size by a huge margin, from a few thousand tonnes DWT to 500,000 tonnes DWT. The density of crude oil also varies, averaging around 0.7 kgs per litre. There are 159 ltrs (apprx) per barrel. From this you can calculate how much each type can carry.
Pipelines, Oil tankers (Ships), Oil Drums, Road Tankers.