Well,

It's leaking or burning. It could be leaking on to the exhaust and burning off, so you never see the puddle.

Or you are simply burning it.

What do your plugs look like? Are they oily or have grey deposits on them?

Have someone follow you to see if blue smoke comes out of the tail pipe.

How many miles in a week?

TB

Tony Boner
Personal: 98cdw27@charter.net Work: tony.boner@sun.com
Saving the computer world from WinBloze as Unix/Solaris/Java Guru http://www.sun.com
1998 Contour SVT Pre-E1 618/6535 Born On Date: 4/30/1997
Now with Aussie Bar induced mild oversteer.