I just took my MY02 WRX in on warrenty now here is the problem. The dealer told me that the #3 cylinder was misfiring because there was not enough fuel burning off due to poor oxygen consumption. The dealer sent in the ECM to get it remaped so there would be a widerwindow for the spark plugs to fire. He said the problem was due to the fuel I was using. I live at high altitude in Denver CO and he said that Federal Law requires the fuel have a higher alcohole content for enviromental purposes than in Japan and OZ.
Have you heard anything about this Federal law?
I was using Premium UnL should I continue to use Premium or go to a lower grade? (I think I should the higher grade for the Turbo)
I was also wondering if I should use Synthetic oil or continue to use the 5-w30 SEA?
Is there any brands of gas sold like Conoco that I should avoid besides generic?
Confused and need some answers!!!