Originally Posted by DavidClass

I figure since it works perfectly, that adding 25 dollars to each oil change to make it, and me, happy, is a good trade off. Actually, its not really adding 25 dollars now that I think about; probably about 10 or 15 dollars since I'm replacing 3 quarts.

The inherent problem is the valve guide/seal design, and the 164,000 miles on a car that has problem seen alot of 100% throttle.

This is my plug for Lucas; I run it in all my cars now:
2006 X5 4.8
2008 X5 3.0
1994 Ford Lightning
11 sec Eagle Talon AWD
1972 Ford LTD Convertible