First off, the number they're throwing around is based on days of reserve. The only time that would actually matter is if all cracking and refining was shut down completely.

Second of all, it's always being rationed. Distributors and stations can only buy so much fuel. If you have a bunch of morons going berserk and filling all their jugs with diesel and fuel oil then the dealers are going to run out and they can only buy so much more.

That's what happens when the tin foil comes out in force by people who have absolutely no idea how the oil/fuel industry works.

TLDR: we're not running out of diesel. Stop it.