As a new owner, I wanted to join a good forum and from what i've heard, this is the place to be.
Have a question regarding a misfire...
In June, I purchased a 2007 Subaru Impreza WRX (wagon). All was great. Ran easy for the first month or so to about a 1000 mile break-in period. Last week took the car in to the dealership for first scheduled service (oil change, inspection) at ~2800 mi. They recommended a synthetic/standard oil blend, I said go ahead. Oil change done, I drove home and parked the car. The next morning, I started it up, and there was the engine light lit solidly, with the cruise control light blinking. Called the dealership, they said bring it in. After they hooked it up, they found the following: P0303 Cylinder 3 misfire detected.
They asked if I had changed brands/octane of gas. I've been using mobile 93 since i bought the car. They cleared the code, test drove it, and said the problem didn't return. Also told me to keep an eye on it.
Question here is, is this something I should be concerned about? they said it could be anything from a loose gas cap, etc. Could just be paranoia but wanted to check in.