8f032b14_r_Visible_Exhaust___NCTCOG_org__Possible_Causes
[Visible Sign] Blue Smoke [Diagnosis] Engine oil being burned [Possible Causes] 
Oil leaking into combustion chamber Worn piston rings, valves or cylinders
Common Causes for Smoking Vehicles or Visible Exhaust - NCTCOG.org
Possible Causes