We have a '99 Trooper that used about 1-11/2 quarts between changes(3-3.5k) & I thought that was a lot! Seems my consumption is less than some. I just switched to Mobil1 truck & suv 5w40 because of the additive package it has, it is my oil of choice for my 6.0 Ford diesel also. The first thing I noticed was the noisy lifters quieted down quite a bit. The oil consumption seems to have dropped by about 1/2 quart.