Thanks to all for your input. My 99 PSD CC, 65000 miles, is using approximately 4 quarts every 5000 miles. My 2000 PSD CC 55000 miles, is using only 1 quart per 5000 miles. As Joe says what is normal according to Ford is somewhat high to me. My older Ford diesels I have owned did not use this much oil even with 300,000 miles on the engine. Makes me a little nervous about Fords quality in the engine. When we all fork over 5K to have a diesel I would expect a near perfect engine, even though anything mechanical will not be this way. Just my .02 worth of thought.

Thanks.