No knocking. I was saying that I was trying to get a part before warranty ran out. My cR has 45k on it and runs greatI have your trim 2015 Eco-Boost with 19K miles. What was your Mileage when you experienced the knocking. I also have a convertible I do the oil changed blended motorcraft once a year since I only put on about 5K or less per year. Motorcraft Oil filter as well. I have used low octane gas when I drive up to Maine the station doesn't have any other fuel type. When I am in the city I run high octane. I haven't experienced any engine knocking and she is parked outside in the cold winters of NYC never garaged kept. I wonder what caused your engine to knock I am interested in hearing your resolve.
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