Originally Posted by AzNMpower32

Eh, we just run premium all the time in the X3. It's not that much $$$ over mid-grade in the end anyway.

Unfortunately, my dad forgot everything I said about ethanol in the X3 (and how it doesnt like it), and went to the Mobil that I know has 10% in its fuel. Now, I don't know if all gas in the US has E10 now, but I certainly don't remember having starting trouble when I filled up normally at the Texaco.:thumbdown Today, I had to try three times just to get the X3 started from a cold start. Like literally I hold the key in "start" for 5 secs and the car just quits and I can't turn the key to "start" again, so I have to take the key out and retry.