I run HESS 93 in mine in massachusetts, seems to be smooth and efficient? Have nothing to compare it to...

No Chevron around here

 

bmw in ocala has done a study on ethanol content in gas sold localy. high of 18 percent and a average of 13 percent. the 3 and 5 series are being recalled so they can redo fuel system since the cars are so sensitive its messing them up.