This doesn't quite apply to Jeep specifically. My wife (fiance at the time) got the extended oil and filter put in her car. The kind that last 10,000 miles. Well it came due to change it. Now being able to do it for her, I changed it. Enter problem. Her oil pan holds 5.5 quarts (she drives a 06 Pacifica), when I changed it only 1 quart came out!!! Luckily it didn't seize and on the surface nothing appears to be wrong but is there anything I can do to help recondition or restore the engine if there is something going bad inside? IE. change the oil again after 1,000 miles, or that "restore" oil additive??? Anyone use this stuff or suggestions? Thank you.