I saw in that I always get Googled for this topic so I decided to feature it here in TPC:
Here it is:
BLESSING OF AN AUTOMOBILE
(Deacon / Priest wearing his cassock, puts above it a surplice and white stole.)
V. Our help is in the name of the Lord.
R. Who has made heaven and earth.
V. The Lord be with you.
R. And with your spirit.
Let us pray.
Lend a willing ear, Lord God, to our prayers,
and bless + this vehicle with Your holy right hand.
Direct Your holy angels to accompany it, that they may free
those who ride in it from all dangers, and always guard them.
And just as by Your deacon Philip, You gave faith
and grace to the man of Ethiopia as he sat in his chariot reading the Sacred Word, so, point out to Your servants the way of salvation.
Grant that, aided by Your grace, and with their hearts set on good works, they may, after all the joys and sorrows of this journey through life, merit to receive eternal joys,
through Christ our Lord.
(Then the automobile is sprinkled with holy water.)