PAT is right,PET or PETG is OK unless the working tempretaure is not high,peak tempature 60-70 centigrage no problem.
If need to withstand higer than 100 centigrade,PA12 is preferable,it's HDT reach 135 or so.
It's up to your working condition.
Since the material should be optically clear, no...
No,PC is not chemical attack rsistant,especially petrol.
The polymer that have all your required characters is: transparent PA12,whose features are as below:
* Clear transparency even in high wall thicknesses
* Good light natural colour
* Can be coloured in transparent as well as opaque...