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  • Allen, Mike. "Synthetic or Mineral Oil: Setting the Record Straight (Finally)." Popular Mechanics. November 21, 2007. (Feb. 2, 2009) http://www.popularmechanics.com/automotive/how_to/4232672.html
  • Carbibles.com. "The Engine Oil Bible." Feb. 5, 2009. (Feb. 19, 2009) http://www.carbibles.com/engineoil_bible.html
  • Nordic Group. "Motor Oil Myths and Facts." May 17, 2002. (Feb. 5, 2009) http://www.nordicgroup.us/oil.htm