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carbon in exost pipeanusi 06-16-2005, 03:31 PM 1999 s-70 black deposit ( carbon? 1999 s-70 turbo. black deposit on exost pipe.102000 miles on car., 10W30 sintetic castrol .Engine uses 1/4 qt of oil on 1300 mile trip. No any problem in 85-95 mph driving :confused: : vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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