As early as 1700, the Ölmühle was located at the Unterweiler Mühlbach. Until 1920, there was a focus on milling rapeseed oil and nut oil, but also grain. For some time, the mill wheel was also used as a grinding wheel (to sharpen tools), a so-called Hanfplauel (to crush and break up hemp stems), and as a gypsum mill.

The adjacent Ölberg vineyard derives its name from the Ölmühle [oil mill]. In 1790, Feihner, the stuccoer, created colours and gypsum from barite to rebuild the parish church.