My '03 is a daily driver. She served well for 164K miles. She drives rain, snow, sun... She sits in a gravel driveway in a small rural farming community.
Then one day, she had enough... The timing chain jumped, and I bent some valves on one head. Time for a new engine, or a rebuild. I was looking for engines, but couldn't find any with few enough miles on them that would make it worth the hassle and expense. I decided to go for a fresh rebuild.
As you can see, a daily driver that goes on country (gravel) roads gets dirty.