call them diesel jeans.
Thats funny. Good answer :-)
White vianager; soak overnight, then in morning, gently rub with baking soda and wash in cold water light cycle; works for my dad he is a mechanic; good luck!
My mum used to do that too. I was going to say that but you beat me to it lol :-))
Vinegar for sure
They may always stink like diesel.... welcome to the work pants zone
They are garage jeans now. If you're not a mechanic, whilst wearing them, get a bunch of engine gunk on your hands, squat, and rub the grimey gunk into everyplace that you'd expect to get grime on whilst working on a car/truck.
Cat litter to absorb the worst, then a specialist degreasing product, there are various ones on the market for fabrics, I suggest you google it!
I have done that. Multiple washings over time. At least you did not get it on your shoes.
set alight to them.
Washing powder won't start a fire - try matches or a lighter.