Before I change my oil in any of my vehicles I always add a quart of ATF and drive about 30 or 40 miles. My 84 Turbo Brat has 154,000 Miles on it and after 3,000 miles the oil looks very clean. When I got the car about 15,000 miles ago the oil was pretty black.After a few changes with the ATF it looks good all the time. Try it its worked in my Sube,my Cherokee, and my 69 Valiant.