I try to avoid offensive language here, but I couldn't resist this, because the more I think about what it could mean, the funnier it is. Was the writer worried you'd take the insult "asshole" literally? Have they taken to calling someone "asshole" as a nickname? Thanks Richelle.
I can only assume that "detergent" "equipment" and "service" are all secret codes for something illegal that you can get by calling the number and saying a secret word, maybe your, um, "product" comes out of this very truck? Thanks Ed.