Is gasoline usable after being stored in a Rubbermaid trash can?
Here is what I know from reading and a real life experiment.  LOTS Of sites (google HDPE and Gasoline) say that it can be used for storage, but I saw none that looked very authoritative so I will not quote them. Some few similarly say no. Wikipedia comments that over time they may become saturated as gasoline permeates the material, but later goes on to mention their use in autos, so pick your answer.

I needed to use it for a short term (about 4 days). It worked fine.  The resulting gas did not appear affected (no cloudiness, and it ran fine afterwards), and the can did not appear significantly affected (not soft or distortions on the surface where it was). The can stinks strongly of gasoline despite repeating washing so it may be a permanent odor effect. My guess is even a few weeks would be fine.

Note my can had been used previously for producing RO water for an aquarium so I knew it was very clean; contamination is clearly a risk. And it won't be used for RO water now, obviously.

My conclusion is that in a pinch this works great, but I think I would be reluctant to trust it for longer periods.  Since the top is hardly a solid seal, I think trusting it for long term would be wrong for all sorts of other reasons also.