The STP Gas Treatment is a fuel injector cleaner designed specifically for gasoline engines. This pack of 2 5.25 fl oz bottles is manufactured in the United States by STP, a trusted brand in automotive tools and supplies. The product does not come with a warranty, but it is effective in keeping your engine running smoothly and efficiently. With a focus on improving fuel performance and reducing engine buildup, STP Gas Treatment is a valuable addition to any vehicle's maintenance routine.