Gas for small planes you check it by sticking your finger in it to make sure it’s full.

I know some people have different practices, but myself and the pilots I’ve known use a dipstick to check fuel level. You do you, but remember that aviation fuel contains lead, which is easily absorbed through the skin. I always use gloves when checking fuel.

I can’t deny that most pilots don’t use gloves, that there are fewer additives in aviation fuel, nor that we are trained to dump checked fuel on the ground. But I don’t see those as “green flags” for aviation fuel.

For anyone interested, here’s the Material Safety Data Sheet for aviation fuel. For comparison, here’s the MSDS for automotive gasoline. I wouldn’t want to touch either without skin protection.