Another reason to stick with top tier gasoline:
http://www.nbclosangeles.com/news/local/Tainted-Gas-at-High-Desert-Gas-Station-Leaves-Some-Cars-Damaged-267730551.html
http://www.nbclosangeles.com/news/local/Tainted-Gas-at-High-Desert-Gas-Station-Leaves-Some-Cars-Damaged-267730551.html