I am the original poster who said: My neighbor's F-150 in the inquiry above is burning oil. It is a 1997 Ford F150 with 157,000 miles. Auto trans, 4WD, and DD. Recently , he checked the oil and found it was four quarts low! He happened to mention it to me. I am having trouble getting more feedback from him. Like most people, he wants the answer to his problem, but doesn't want to provide any info get good, valid feedback. I am trying to find out what type oil he uses, how much it uses, and if he has a MIL on the dash. He was about to start to look for a re-manufactured engine for it. Let's save him from buying and installing a rebuilt engine by finding out what is the cause of the excessive oil burning. It maybe a simple fix like the above mentioned upgraded Ford PCV hose /which I have e mailed to him. Thanks for the suggestions, Jim