good enough!

 

I've washed plenty of engines using an engine cleaner and low pressure water rinse.
You've got to be careful not to spray high velocity water into the elecrical connectors. Cover areas you want to keep dry.
I do this just like I clean my motorcycle:
Engine must be cool to start with. After the final rinse, start the engine and go for a drive. Engine heat will evaporate any residual water, so a good long drive is best.

 

I've had a heat extractor hood on my car since 2007. I never need to clean the engine bay because it gets cleaned every time it rains. It's rained on the car for three days straight (wide rainband) and it never caused a problem. So it should be fine.

I am wondering why a 'top off' took an entire quart of oil though.

 

I've washed my engines at the corner self-serve car wash for decades. Just spray it down and avoid the sensitive electronics like the alternator, and everything is fine. Never have had a problem. If the spark plugs get water fouled, the spark simply goes to ground. When it dries, it works fine again. This was a problem in the old days when cars had distributors. This doesn't seem to be a problem on the newer style (each plug having its own coil).

 

I had the engine bay cleaned with a power washer, which removed most all of the oil, and it fired right up afterwords. A new oil filler cap, and all is well.