Customers can purchase fuel system cleaners online from Amazon.com and ArmorAllSTPStore.com. Amazon.com lists more than 275 results for fuel system cleaners, and STP sells two versions of its fuel system cleaner online, as of March 2015.
Brands of fuel system cleaner sold through Amazon.com include Chevron, Royal Purple, Red Line, Gumout and AC Delco. Prices range from $3.33 for a single bottle to nearly $600 for a pack of six 80-ounce bottles of diesel fuel tank cleaner. STP sells for $8.99 to $11.99 per bottle.
Shipping hazardous chemicals such as fuel system cleaner must be done through ground-based trucks. Shipping times may be delayed one to two days because of the extra handling involved.