Three years later than the original post, I can grant the cap level is no more lev 100, since I've just hit myself 101. I'm a relatively new player (being playing this for some 4 months), I had looked for information about the cap just to understand when I had to expect the "game over" feeling, this is why I knew this thread. I don't know if there is a new cap and, in case, which level it is, I'll keep you informed if I hit it, or I shall read some news by someone else who did. Cheers.
Adding to this, now level 105. You won't earn GOLD points, in fact you just earn 5 slots of room space in your storage. The fuel refill stays the same.
