How long does one 90g can last?

Gel air fresheners typically last several weeks depending on cabin temperature and ventilation. Warmer temps speed up evaporation, so a summer vehicle will burn through it faster than a winter garage queen.

Where do I mount this in my car?

The can works in cup holders, on dashboard vents, or under seats — anywhere with air circulation. If your can came with an adhesive backing or clip, mount it where it won't interfere with visibility or controls.

Is this scent strong or subtle?

White musk is a softer fragrance profile, not aggressive. It fills the cabin gradually without the chemical sharpness of spray fresheners — better for longer drives where you don't want scent fatigue.