Heat oil in a large skillet over medium-high heat. Brown pork on all sides, about 10 minutes.
Put pork roast in crock pot. Mix together the remaining ingredients (except sauce ingredients). Pour over roast.
Cook on low 7 hours or until tender.
Remove pork and keep warm. Skim fat from juices in crock pot (optional). Stir in half and half and mustard. Cook on high 15 minutes or until slightly thick.