Mike S. writes:

I got some sort of smell on my clothes that I believe is diesel fuel,
grease, or oil. I'm thinking that it must be diesel fuel but I can't be
certain.

Sounds like sulfurated hydrocarbons which are present in diesel and
especially gear oil. You could try rinsing with naphtha (dry cleaning).
But sulfur has a way of binding to fabrics chemically, and that just
doesn't come out with detergents or solvents.