Thermal Engine
From Feed The Beast Wiki
Description: It is an engine that can be controlled as other engines considering priority. It uses lava as a fuel and requires a tank to be added to the hull.
Specs: Modular cost: 28 Occupied sides: None Requires: atleast 1 tank of any type to be added to the hull Fuel: Lava Fuel consumption: around 3mb/s without tools. Conflict with Advanced Thermal engine.
Pros: -Relatively cheap to assemble and to run -Low fuel consumption -Can be used underground or in the nether
Cons: -Difficult to manage fuel with cargo manager, so you have to add a liquid manager to fill the cart
Example usage: Nether miner cart with lava pump refueling stations and if you have nether ores installed preferable quarry cart engine.