JAR- not sure about the gas cap.
i like that there are holes in your oil cap where if it gets too hot or tight during an oil change, you can slot a screw driver to turn it.
my nismo one gets EXTREMELY hot so i have to wear my work gloves and crank it while looking like this (>_<) errrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr!!!