Buyable Heavy Fuel Tanker Semi-Trailer

It could even become buyable as early as having completed the task that makes You haul it to the factory in Black River, Michigan. - At that point You're clearly able to use it.

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Nextej wrote:

... I don't think reaching 30th lvl has any actual reward, two birds in one stone.

Yes, in that context, it's perfectly reasonable. I like it.

What should the price be? - Should it simply have the same multiplier as its capacity compared to the regular Fuel Carrier Semi-Trailer, or should it be less dollars per liter as a reward for reaching the higher level and more difficulty dragging it around?