My name’s Masen Koster, and I grew up right here in Sioux Falls, South Dakota. What started as me obsessing over keeping my own Miata clean turned into a real passion for detailing done the right way.

In March 2025, I launched Koster Mobile Detail, and by April I went all in, running it full-time. My goal has stayed the same from day one: make every vehicle I touch feel new again, at a price that makes sense.

I focus on quality, consistency, and taking the time to do things properly — whether it’s a full interior detail, paint correction, or ceramic coating. I offer both mobile and in-shop services, bringing a professional detailing experience straight to you.

Passion. Quality. Convenience.