I always read that when cooking a pot roast in a slow cooker, you should cook on low for 8 hours. If you don't have time, 2 hours of high and 4 hours of low is OK, or 4 hours on high; but the best result is 8 hours on low.
I recently got a new slow cooker and found it hits the safe temp (145F) after about four hours on low. Unfortunately, I never checked the temp halfway through on the old one for comparison.
Should I take it out, or should I keep cooking for the remaining 4 hours?