Black soot n muffler

Asked by Swervin Dec 14, 2016 at 08:31 PM about the Cadillac DTS

Question type: Maintenance & Repair

I notice some black soot on back of
bumper. Put my finger in tail pipe and
came out black. Am I using the wrong
type of gas for my 2001 caddilac dis.
I've been using premium but manual
says regular. Is this my problem??

1 Answer

Try regular but a little soot on the tailpipe is normal. Does your car use oil?

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