I didn't know what group was best to ask this in but I figure someone
here should know the answer.

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. I've already washed the clothes as I normally would but the
smell won't come out. There doesn't seem to be any stains from whatever
is causing the odor. Any ideas on how to get this horrible smell out of
my clothes?