Error, '=' expected

I am currently trying to make a somewhat advanced program and so far I've been doing okay. That is, until recently I hit a snag. I am getting the error message "bios:14: [string "ekT5pKm0"]:37: '=' expected


The part of the script that is getting the error is

print("Refuelling")
if 20000 - CurrentFuel >= 5000 then
	print("Low on fuel. Refilling until at 5000 fuel.")
	print(CurrentFuel)
	turtle.refuel
else
	print("All fueled up.")

I have the local variables set up, so it's not that. The link to the full script is below.

Spoiler

http://pastebin.com/ekT5pKm0

You've got a reference to "turtle.refuel" there, immediately followed by "else". The VM's suggesting you might've wanted to assign something to turtle.refuel, but in this case you wanted to call it (by adding brackets).

You've also neglected to call turtle.getFuelLimit back up on line 9; MaxFuel is set to a function pointer instead of a number.

Thank you! That fixed it.