I have heard that some General Motors cars have a feature that will shut the car down if it detects a dramatic drop in oil pressure, to prevent engine damage. Is this true!!??

SOURCE: Significant engine damage from oil change

Thank you for asking my assistance. I will try my best to help you.

I have been in the Toyota biz for the last 14 years, and, unfortunatly, have not ever heard of this issue. That being said, I do have connections in the engineering dept at Toyota, and on Monday, I will call out to the west coast and inquire further for you.
Now, to the issue at hand: The shield that was bent down is secured very well to the underside of the valve cover. To bend that device, I can only guess that when the oil was being put into the engine via an oil pump, the nozzle of the pump was *** jammed *** down onto the shield, and broke it loose from the internal retainers under the valve cover, and contacted the cam; this is very possible...I agree with the statement that your SM provided, however, further engine damage? Removal of the oil pan would be in order, to determine if any more pieces are there. Doubt it, though.
And, to answer your last question, the responsibility of the cause for failure is your oil change guy.
He bent/broke the shield, and caused your problem. I hope this has helped, if you have any other comments or questions, please feel free to repost.

SOURCE: The oil pressure gauge keeps dropping down to 0 while i am driving

If you don't hear any ticking or knocking while the pressure gauge drops, the problem is probably a failing "oil pressure sensor". If you do hear a ticking or knocking, the problem is probably a failing "oil pump".

SOURCE: 91 NISSAN MAXIMA , ran out of gas , and put gas in

if it ran out of gas it just may be air locked, you can't just crank the engine turn the key to the run postion for 3 seconds and shut off and do this 7 or 8 times then try starting it. The fuel pump will not pump while cranking it is a fail safe if the car is in a wreck and the pump won't continue to pump gas out and catch on fire. This should fix it for you.

SOURCE: oil pressure gauge goes up when car started, but then down to 0

u Have a problem with the oil sending unit. The sensor is located beack right side of the engine block. Take out the switch and make sure u have good oil PSI. Should be 6 psi at idle and around 50 at 4000 RPM. If the presure is ok replace the switch they are very cheap about 20 bucks. Please rate.

SOURCE: I think I forgot to put oil in the car or even check it...Oooops!

If you heard a shriek, squeak or squeal, you most likely have AT LEAST a spun bearing. This must be replaced. The shaft it is on is also damaged, if not totally ruined.

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