Originally posted by estrellajon
Well here's the results. I filled up with 89 octane and drove 50 miles. Mixed driving from stop and go and highway. There is definitely a very slight decrease in power on the stop and go, however, I did not notice it on the highway. The car ran fine and smooth and did not knock or ping like I thought it would.
How did you detect this? The only way to read pinging/knocking is to use MB OBDII scanner to read your knock sensor reading. Only excessive pinging can be heard from outside the block. Just because you don't hear it, doesnt it mean it doesn't happen!