I have about 1900 mi on the Rotella T syn oil and its only down about a 1/2 qt With dino oil I am usually down a qt. I have been hard on the throttle to see how it holds up. With M1 I would of used several qts of oil. One strange thing is the oil pan seep leak from the front pan hump stopped leaking. I don't know why. Is this oil miracle oil?