Weird behavior - Gas in oil after sitting for three months, ignition on and battery drained Options

[Jett]

Hello we hit a weird failure mode of gasoline in the motor oil and cannot detect any mechanical issues.

Our 73 2.0 was recently restored and engine rebuilt using NOS, refurbished, or new parts. After the car was together, we spent several months shaking out the bugs by driving->identifying issues->fixing (repeat), until it was running very well.

That said, once the car was mechanically sound, I switched focus to deep cleaning and waxing the car for the first time (IMG:style_emoticons/default/smile.gif) and found a small flaw in the paint that required a visit back to the body shop.

We dropped the car off before the lockdown and it sat for more than two months, before it was fixed.

The problem: The body shop inadvertently left the ignition on and the new Optima battery drained out, but after charging the car it would not start. We pulled the plugs and they were soaked in gas, which lead us to check the oil. The oil was full of gas.

We towed (carrier) the car to our friends shop who could not find any obvious mechanical issue, so we cleaned the plugs, replaced the oil and filter, ran the car. The car ran perfectly. We drained the oil and replaced the filter for good measure. The car is running well, no signs of injector or seal issues, and lots of power.

Any theories?

I thought that it could be the pump cycling on and off as the battery starts to fail / recover, but this should not cause the injectors to fire.