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Blue smoke coming from exhaust

Tiny
JFAKTOR
  • MEMBER
  • 2007 NISSAN MURANO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 77,000 MILES
I have blue smoke coming out of my tailpipe and the fuel mileage went from 22 mpg (highway) to 13.8 mpg (highway). Can anyone tell me what to do?
Friday, August 27th, 2010 AT 11:35 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

It sounds like one of the piston rings has broken allowing oil and low compression on one or more cylinders how does the car seem to run? Also you could have plugged drained back oil holes which can fill the top of the engine with oil or the PCV valve needs to be replaced

Here is a guide to help us

https://www.2carpros.com/articles/blue-smoke-from-engines-exhaust

Check out the diagrams (Below). Please run this test and get back to us.
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Friday, August 27th, 2010 AT 5:46 PM
Tiny
OIDAVEY
  • MEMBER
  • 0 POST
Thanks for this post I had this problem and had to get a new PCV valve cost me $32.00 all fixed I love this site.
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Tuesday, August 20th, 2019 AT 11:48 AM

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