Tireworks is advertising via an email with this link http://www.autocaresupersaver.com/ and the following:
"Purchase any super saver card Nationwide for Only $24.99 with free shipping. 3 oil changes plus additional services only $24.99.
Email us at [email protected] and a rep will reply promptly"
I purchased it online and they sent me the voucher. But when I went to the store to get my oil change, the attendant said that they were not honoring the vouchers anymore and would not issue a refund. They said they would send me another voucher for a store that would and they never did. They still have not issued me a refund or a new voucher.