Rich Posted September 25, 2008 Report Share Posted September 25, 2008 I've recently begun to notice some carbon fouling on my exhaust tips after about 25 miles of relatively high speed running (75-80 MPH for about 30 minutes/25 miles). This must be a recent development as I've owned the car since new, for 12 years now. 1997 Eldorado ETC with just over 100,000 miles now. My driving cycle has changed somewhat over the past few months so I now drive about 50 miles daily (round trip) virtually all highway. I'm a regular advocate of WOT maintenance and the car doesn't blow any smoke ever (not that I can see in my rearview mirror) during WOT applications. The fouling wipes right off with a paper towel, but it now seems to require cleaning daily to look clean. As I said, this appears to be a recent event and I'm wondering if this is something that just develops with high mileage cars. I suppose I can change gasoline brands, I currently use Shell which is a top tier brand I believe. I'm in New York and don't know if this might relate to a seasonal blending issue or something. Hopefully this isn't a sign of some deeper trouble. I had the dreaded head gasket repair this past February at the dealer (timeserted all 20 headbolts, etc, etc) and the car runs great as it always has. So whats up with the sudden fouling? Any ideas? Thanks all in advance. Link to comment Share on other sites More sharing options...
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