What does the Millennium Falcon use for fuel (and how big is the fuel tank)?
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1starwars.wikia.com/wiki/YT-1300_light_freighter/Legends– JohnPCommented Jan 29, 2018 at 20:19
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6So ... not liquid schwartz, then?– dmckee --- ex-moderator kittenCommented Jan 29, 2018 at 22:30
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10The fuel is actually the tears of star wars fans who were upset with Lucas on whether Han shot first.– Hans OloCommented Jan 29, 2018 at 22:32
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1@Kidburla - A decent answer can address all of these– ValorumCommented Jan 29, 2018 at 23:13
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18"What does the Millennium Falcon uses for fuel?" Plot. It uses plot for fuel...– RonJohnCommented Jan 30, 2018 at 0:24
2 Answers
Sublight Engines
According to the (canon) Force Awakens: Incredible Cross-Sections, the Falcon uses
liquid metal fuel
to power its sublight engines. There's no indication which metal.
You can see the fuel tank on this earlier (and non-canon but still excellent) plan from Star Wars: Incredible Cross-Sections. Assuming it's hollow, the tank depicted appears to be around 3-4000 litres in volume.
Hyperdrive Engines
The Hyperdrive engine is powered by ejecting
Hypermatter particles
The tanks are sufficiently large for them to cross half of the galaxy without refuelling.
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31
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27
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83,000-4,000 liters is quite a lot of T-1000s, if you think about it. Refueling must be pretty dangerous. Kind of surprised they never showed that process in any of the films; could have made for a pretty epic action sequence, with the right director. Commented Jan 29, 2018 at 22:47
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32"The liquid fuel sublimates into a poisonous gas"... Somebody needs to be taught the meaning of sublimation. Commented Jan 30, 2018 at 2:26
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6@Lexible It's simple terminology. Solids sublimate, liquids vaporize.– JABCommented Jan 30, 2018 at 5:33
TLDR: liquid metal fuel
As suggested by @JohnP, from the Wookieepedia, YT-1300 light_freighter it is stated that the YT-1300 (the model of Millennium Falcon) use fuel cells powered by liquid metal fuel.
Another canon source is the Star Wars Millennium Falcon YT-1300 A 3-D Owner's Guide written by Ryder Windham himself:
Edit: as @Valorum says, those sources are not considered canon but rather "Legends" i.e. pre-2014 canon, subject to change.