Worn piston rings will allow fuel and oil to seep through between the pistons and the cylinder walls.
if you have engine oil in your fuel injectors then you have bigger problems then your car not starting..
yes, no fuel pumping to the engine your car will not crank, be sure it is the fuel pump and not the oil pressure switch or any other problem.
too much fuel in your cylinders!
Yes it can but you risk doing more damage internally if coolant is mixing with the motor oil.
.Mixing a small amount of oil in the diesel fuel will not hurt a motor. The motor will run rough and produce black smoke.
always mix your fuel with your oil before adding it to any machine.
no but not mixing fuel to oil ratio correctly will seize a motor
A car can be driven with a cracked head, but not very far. Once the head is cracked, the engine will start mixing oil and water and it is likely that the motor will lock up.
you can eliminate your oil injection and premix your fuel. Good mixing Ratio would be 50:1 to start but you may go to 40:1 mixing ratio. Watch your plugs and make sure you're not too rich or lean to help you figure out what ratio to use.
Blown head gasket. But with a blown head gasket wouldn't you notice a kind of milkyness to the oil when you checked the oil because of the mixing?
quick answer: oil
no