You can check the Cole Palmer materials database to check compatibility with ethanol and toluene (close enough to petrol). Generally ethanol is one of the more gentle chemicals. It's fine with most rubbers. It is hygroscopic (means it sucks water out of the air), pretty much just means its best not to leave it too long. I doubt you'll have any problems. Best approach is just run with it and keep an eye on things. Upgrade if you have problems.