The traditional Roman Ritual has wonderful blessings for all sorts of things we use in our daily life, things and places not designated specifically for sacred purposes. For example, you can get your grapes blessed, along with your airplanes, mountain climbing equipment, seismographs, sick beds and linens for the sick, and your molten metal (intended for bells).
My friend the mighty PP of Margate, His Hermeneuticalness Fr. Tim Finigan, has a post about blessing a car.
I should interject here that when I bless cars they are often thereafter involved in an accident. I always warn people about that. One time, however, a lady came back to me and said: “Imagine how bad it would have been if you hadn’t blessed it!”
The blessings in the Ritual will often be quite poetic, drawing on images and events from Scripture. The blessing of a car mentions how the Ethiopian Eunuch was tooling along in his chariot when he ran into the Philip the Deacon (cf Acts 8).
The blessing for a fire engine mentions that the youths were unscathed in the fiery furnace (cf Daniel 3). The blessing for a generator uses Ps 91: His lightnings illumine the world; the earth sees and trembles.
I once used the blessing for mountain climbing equipment for the hardware that went into a knee replacement.
Check out Fr. Finigan’s post. He even mentions my old friend and teacher, the Latinist Fr. Reginald Foster.
In Italy a few times I stood along the street and blessed cars on the Feast of St. Rita. I wonder if there was a sharp spike in accidents that day.