this stuff is pretty sweet. up's the octane 3 levals it says. car seems a bit more spunky to me even enought to say few hp is possible I think. runs awsome. it's been 104F around my place and it's been running sweet. cost $4.52 at walmart I think. think when I go racing next time I might use it. thought i'd let you guys know my $0.02 anyway.