It's not as efficient as the advanced oil ones but can be used in locations where no water is around.
The output is mostly balanced: one side 2 fuel/light oil, the other side 1 fuel/heavy oil + 1 fuel/petroleum.
As the three liquids are however produced at different ratios (3:3:4) at the oil refinery, it's a little bit off-balance, but not much.

It looks as boring as it is but the more interesting designs had the same footprint (14 x 6) and used a little more resources.
There is a shorter solution (13 x 6) but so far I did not manage to balance the lanes.
As with the previous design it can easily be chained.