There have been a few suggestions for this and I think it is rly needed. Fuel is one of the most valuable things in the game since it makes the best planes and helps increase the speed of most land vehicles. Sadly we can't make planes with fuel unless we have fuel blocks covering every inch of our plane and even then we still don't get very much time before we run out. The only plane I have that flies rly well using thrusters is my AA aircraft and even it doesn't last very long although it has fuel blocks covering it. We just need fuel blocks to carry much more fuel.