When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Buccees is not on the list so they don't participate in the TopTier progam. TopTier licensed brands must participate in the TopTier program. They pay a fee, and agree to use an additive (does not have to be techron) that meets the TopTier performance specification. A non-approved brand means they do not participate in the program. That brand may or may not meet the TopTier performance specification. Costco, which is TopTier injects their additive at the stations - its in a separate tank - I know this because I contacted them and asked.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.