A lot of the American oil companies like Valvoline for example, doesn't even waste time digging for oil, they make theirs from recycled oil. They hydrotreat the used stuff you drop off at the auto parts store, and make brand new high quality synthetic oil out of it.
A lot of the American oil companies like Valvoline for example, doesn't even waste time digging for oil, they make theirs from recycled oil. They hydrotreat the used stuff you drop off at the auto parts store, and make brand new high quality synthetic oil out of it.
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