Exhibit (a)(1)(o)



                                  TENNECO INC.
                                SUPPLEMENT TO THE
                         OFFER TO AMEND CERTAIN OPTIONS
                 THIS OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT

                 11:59 P.M., EASTERN TIME, ON NOVEMBER 26, 2007

                 UNLESS THIS OFFER IS EXTENDED BY TENNECO INC.



         Tenneco Inc. hereby supplements and amends the Offer to Amend Certain
Options dated September 25, 2007 and amended on October 3, 2007 and October 18,
2007 (the "Offer to Amend") as follows:


Extension of Offer


         Throughout the Offer to Amend, all references to the expiration date of
the offer, which was originally October 22, 2007, are amended to extend the
expiration date of the offer until 11:59 p.m., Eastern Time, November 26, 2007.
Until that time, if you have previously elected to accept this offer with
respect to your eligible options, you may withdraw that election with respect to
all of these options.