If it is blue, then oil is burning. Listen, if this is the original engine / miles, chances are the #4 cylinder is low on compression due to an issue with rings. As a result, burning oil and fouling the plug and causing a misfire and power loss. Chances are that the oil burning has damaged the catalytic converter. If the mileage is correct, I recommend checking engine compression.
Friday, October 17th, 2014 AT 5:45 PM