Fuel replenishes (edit: for free) over time, but you CAN use farmville bucks for it.
I just use the seeder to make sure that everything on HUGE plots gets planted at the same time. I always run out of fuel, but it always works out. I'm level 26 and I have NEVER taken a quiz/purchased money to advance. Just takes a little time
---------- Post added at 11:42 AM ---------- Previous post was at 11:41 AM ----------
And do you guys trap your farmers? It is MUCH faster and it eliminates ALL travel time used to harvest/plow/plant. Next time you go to the game, your farmer is standing in the middle. Just use 10 haybales to completely enclose your toon. Try it!