Considering the pricing of other OKW vehicles, the resource penalty and the old call in price, yes I think the fuel cost is too much.
If the tank wasn't in T4 I would think differently, but at the moment it is overpriced. I played around with them in the alpha and they still got mauled by m10s despite being priced at double the cost. You can't really say the same about a 85 or an E8 vs a puma.
