Oil Gas

what happens if you put an oil/gas mixture in your gas tank in a truck?

mixture of gas and oil. put 1/2 a tank in by accident. now it shudders the whole truck. it seems like it is not running on all cylinders. whats wrong and how can i fix it? it is a fuel injected 1993 ford f-150 V8. 302.

you fouled out your spark plugs most definatly... You probably didn't ruin your engine, but I gurantee there are a whole slew of problems now.. For one you need new plugs, 2 your sensors probably all tripped because of the emmisions, and I bet your check engine light went on. 3, you may have clogged your fuel injectors, 4... who knows

I would completly drain the gas, change the fuel filter, change plugs, drain all gas lines as best you can, and refill with fresh gas and start it and see what happens. Most likely it will foul out your next set of plugs too because of the oil still in your high pressure fuel lines and fuel pump.... so go ahead and change plugs a couple times if you need to. Probably go ahead and put some good injector cleaner in there once you get it running reasonably well.
You may need some new O2 sensors as well so you could be in for a bit of work.

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