Pour vegatable oil in slow cooker. Place the pork roast into the slow cooker

Pour in the BBQ sauce, apple cider vinegar, and beef broth

In separate bowl, stir the brown sugar, ground mustard, Worcestershire sauce, chili powder, garlic, and thyme. Mix into slow cooker

Add halved onions

Cover and cook on High until the roast shreds easily with a fork, 5 to 6 hours. Take onion out after 2-3 hours, and add Sweet Baby Ray's BBQ Sauce after 4-5 hours

Remove the pork from the slow cooker, and shred the meat using two forks. Return the shredded pork to the slow cooker, and stir the pork making sure it is mixed with all the sauce

Split buns, add butter, cheese, and some Sweet Baby Ray's BBQ Sauce, pulled pork and enjoy!