I know I'm getting old and my eyes aren't what they used to be, but this one is stumping me. This is for my 1968 Trans Am Series car set, this image is of Ken Deckman's #8 Camaro. There are just two lonely decals on this car and the one on the rear quarter panel is evading me. I'm pretty sure that it's a Quaker State Oil decal, but I can't make out what that bit at the top left side is...is a flame? I need to recreate it or find it for Deckman's car. He ran at Continental Divide, Riverside, and Kent...

This picture is from 1967 but it shows the same decal in the same place and is the best image I can find...
Maybe it's an oil derick? I don't know...