After cleaning my EGR Valve Saturday, I finally found time to go fill up the tank. Goods news is no engine light, but thats not the point of my message. Since gas where I live dropped around 8 cents, I put the 93 octane or "super" in my tank this time. Did seem to notice a small difference in the motor. It sounds like it is running smoother. So I was wondering, what does everyone else put in their tank? cause the book says to use 89 octane or the medium grade.
