If your car is not a Diesel, YES! It will harm your car. Diesel fuel is less refined than conventional gas. It has contaminants and water in it. You may end up with carburetor problems, and if you have fuel injecion you may have a very costly fuel injector repair on your hands. Please only use the fuel recommended for your car. Most cars nowadays have that printed on the inside of the gas tank door where the cap is.
Drain the whole thing ... the two fluids mix well. (but a few percent diesel will not hurt a gas engine.)
Assuming it was not a vandal that did that, then no.
Mix it with the fuel, usually just put it in the fuel tank just before filling up with fuel
Sulfer & water content....and if it's off road diesel fuel - the color. It won't cause problems to use diesel in a heating oil tank, but it will cause a whole lot of trouble if you use heating oil in a diesel tank
No. Do not put unleaded gas in a diesel tank.
you fill gas in it
I have a 2001 with a diesel and its a 38 gallon tank
The tank is not venting properly.
2001 ford diesel has a 36 gallon tank
it is under the car,near the diesel tank
if you mistakenly put gas in tank instead of diesel, just drain or syphon gas out of tank refill with diesel and go on the gas will actually clean injectors but wont do any damage to the engine gasoline used to be added to diesel by truckers, in the winter to stop diesel from gelling. you make get some black smoke from exhaust till gasoline is gone ,but a little gas wont hurt the engine
Yellow