My solotion for half a decade has been to overfill by a quart; so, fill with 6 quarts; and it really seems like it burns leff oil; but oil does disappear, it can be seen inside the exhaust system; caked up my O2 sensors, soooo, heating those up with a TORCH til they glow hoping they would come out, and they didn't even when glowing, actually fixed that problem, all buildup on the sensors renewed them and I have not more codes lolol