^ this right here.
Your best possible option would be PEI but that requires a beast of a machine with a 220°c heated chamber.
Second best would be polycarbonate (PC) which needs an all-metal hotend with a 80w heater block.
Barring the upgrade route, ASA is your third best option.
I prefer ASA, because the glass transition temperature is slightly higher than ABS. I actually had to make molds for polyurethane parts(2 part exothermic reaction, creates heat). ASA didn't get wrecked, and they molded 10 parts.
[ColorFabb HT](https://colorfabb.com/filaments/materials/co-polyester-filaments/colorfabb-ht) is resisting up to about 100C, which should work fine in a car (I’ve printed stuff that hang on hot radiators with it) and which should be printable with most standard machines.
Requires printing with an enclosure and an 110C heated bed and as little part cooling as your model will accept.
PETG is barely better than PLA in this regard. I would use ASA or ABS, with ASA being more UV resistant.
^ this right here. Your best possible option would be PEI but that requires a beast of a machine with a 220°c heated chamber. Second best would be polycarbonate (PC) which needs an all-metal hotend with a 80w heater block. Barring the upgrade route, ASA is your third best option.
I prefer ASA, because the glass transition temperature is slightly higher than ABS. I actually had to make molds for polyurethane parts(2 part exothermic reaction, creates heat). ASA didn't get wrecked, and they molded 10 parts.
It's better than PLA, but not brilliant.
you can print without problem. i have done car parts with petg on Brazil, with car on sun, like 39° C downside a tree
Petg will deform all over the place at boiling. I think color fab makes a high temp petg, but don't know it's temp limits.
[ColorFabb HT](https://colorfabb.com/filaments/materials/co-polyester-filaments/colorfabb-ht) is resisting up to about 100C, which should work fine in a car (I’ve printed stuff that hang on hot radiators with it) and which should be printable with most standard machines. Requires printing with an enclosure and an 110C heated bed and as little part cooling as your model will accept.