Exhibit 99.13 (Text of graph posted to Ashland Inc.'s website concerning Valvoline's lubricant sales gallons 3 Month Rolling Average (millions) 2001 2002 2003 2004 2005 2006 ------ ------ ------ ------ ------ ------ January 13.0 15.1 14.3 13.6 13.1 13.1 February 13.1 15.0 14.5 14.5 12.9 13.2 March 14.6 16.2 16.2 15.8 14.1 14.7 April 14.2 17.1 16.7 16.8 15.1 15.0 May 15.5 18.1 17.2 16.9 16.0 15.6 June 14.9 17.9 16.4 16.7 16.0 15.0 July 16.6 17.0 16.6 16.8 15.4 14.7 August 16.8 17.3 16.4 16.5 15.0 14.4 September 18.2 17.8 17.1 16.8 14.7 13.7 October 17.4 17.5 17.3 15.6 14.5 14.0 November 16.6 16.0 16.1 15.3 13.7 13.2 December 14.4 14.8 14.6 13.7 12.8