Pulled Pork with Root Beer Sauce

I know that this sounds really weird but I've tested it during multiple meals with many people and it always gets rave reviews. I have to confess that I don't usually tell anyone that it's got root beer as the main ingredient until after the good reviews start coming in. It'll feed a fair number of people and there is usually leftovers the next day. The official recipe yield is 12.

1 T olive oil (whatever, I use as much as I need)
3 lb boneless pork loin roast
2 t salt
1/2 t pepper (I use significantly more than this)
1/2 c chopped onion
3 c root beer (NOT diet, ever, it just doesn't work)
12 oz bottle of chili sauce (or 455 ml for those of us living in civilized countries)
1/2 t salt
12 sandwich buns

Brown roast in olive oil. Place in crockpot with salt, pepper, onion and 1 c of root beer. Cover and cook on low for about 7 hours (roughly).

30 minutes before serving (but can be done more in advance), bring remaining root beer, all of the chili sauce and the last little bit of salt to a boil in a saucepan. Reduce the heat and simmer until it's glassy and reduced to about 2 1/2-3 cups of sauce.

Remove the pork from the slow cooker and shred with two forks. Put all the little bits of pork into the sauce and stir until it's all juicy and coated. Serve about 1/2 cup of pork on each bun (or as much as you can cram on there).

That's it, that's all.