Do NOT use Premium Fuel to fill your gas tank

[Xarko]

It's probably a bug, but right now using premium fuel to run your vehicles is highly inefficient. 50 mixed fuel = 1 premium fuel = 1000 gas tank, but also 10 mixed fuel = 1000 gas tank. For the time being only use premium fuel as a crafting mat to build turrets n stuff and only use mixed for your gas tank. I just randomly noticed something is off today after wasting like 20 premium barrels over the last week...

[Zamber]

Second truck (and higher for sure) takes only Premium fuel, so yea save it for next tiers.

[Fxmodder]

once you get an oil refinery going, its not much of an issue, but yeah i get the point and i do agree, premium is best served elsewhere