[The Philpott]

If we take the labelling at face value (ie petrol acid and oil resistant) then these are probably ok. Certain rubber parts like these O rings can be available suspiciously cheaply- but sometimes i suspect this is because they have become sidelined as being inadequate following the insertion of ethanol into pump petrol.

I did encounter some really naff ones (can't remember the source) a few years ago when making a silly diet coke/mentoes fountain for my daughter (hardly aggressive chemicals!)- The O rings used to seal the leaks rotted in less than a year.

Dave