It's rare for an engine to fail suddenly - we find it's a lot more common for a problem to crop up slowly, then it goes from a small problem to a big one. Enter the value of used oil analysis. We're checking microscopic levels, so you can catch a problem early, and that was just what happened for a recent customer and their 2013 BMW M3. Listen along with our host Joe as he details just what sort of problem was brewing in this M3, and how we caught it.