i don't do anything....the mechanic tells me to go tell dispatch, and then they give me another truck.
one company i drove for, an LTL company, told me not to worry about, get back home, next trip on down they will give me another truck.
my last job, just before my injury, if my truck went in for service, and didn't pass the emissions, they too just got me another truck, till mine got fixed.
so i worried not.
i do not know of too many o/o's here...but i am sure the one or two, will tell you soon enough.
otherwise, us company driver's, just don't really worry.
and most of us company driver's are forbidden to use any chemical additives.
washer fluid, oil, diesel, and coolant, are about the ONLY fluids/chemicals, we are ALLOWED to use.