Ok, Strange issue here. 2011 Hemi in 1/2 ton 4x4 truck. I do all the oil changes myself and always put 7 quarts in. Last weekend I drained the oil and only got 4 quarts out of it. It has no leaks, I checked. engine and under the chassis is spotless. And it does not smoke at all either on start up or driving. Runs great and clean. So how could it have lost 3 quarts of oil in 7000 miles? I use Valvoline full synthetic 5w30 just FYI. And it has about 50k miles on it.