The other night I was on my home from a road trip and when I pulled into a gas station, tons of smoke started poring out from under my 85 ranger. I looked under it and it was all motor oil. I checked and i didn't trow a rod, crack the block, or do anything to the motor. I went ahead and added a little gas just cause I was past empty and it fired right up not a single problem so I moved it from under the the pump house off to the side what could cause this, oil filter, hole in pan (but I never hit anything).
