$19.99 Oil Change at Firestone (exp. 1/26) January 10, 2014 By: Tricie share Firestone is offering a $19.99 Synthetic Blend Oil Change when you use this Coupon. Print now if you are in need of a service, also keep in mind it expires on 1/26. Please be advised that this post may contain affiliate links. See my Disclosure Policy for details.