Re: Puddle of coolant on the garage floor today!
Basically the knock sensors detects "ping" caused by poor fuel/poor combustion conditions. It causes the engine timing to be changed to prevent the pinging which could otherwise damage the engine.
Many cars which say to operate only on premium fuel can run on lower grades of fuel because the knock sensor and other sensors will adjust the engine to run on the lower grade of fuel. The mileage and power will be somewhat negatively affected, but there are those who say they have never run the "required" premium fuel in their engines with no problems.
2010 Summit White Traverse LTZ, SOLD 4/2012 <br />2015 Traverse 2LT Siren Red Tintcoat-36 Month Lease