Hi, I took my 2019 Honda CRV to the dealership for an oil change. The next day the car was coughing and black smoke was coming out of the tail pipe. Discovered they had put 7 quarts of oil instead of 3.9. What should I be concerned about and what should I expect the dealer to do? Thanks!

 

Who discovered it? Was the oild change and the discovery both written up in forms that you could show to a lawyer? With the overfill removed, there's no other evidence.

The normal last step in an oil change is checking the level after running the engine for a few minutes. A 3 qt overfill couldn't be missed with a dipstick test.
If the dealer's service shop overfilled it, the service shop, which is usually a separate company from the dealership, would be liable for consequential damages.

 

Bet it's more likely they never drained old oil which would likely mean they never changed they changed the filter.
just my opinion

 

That was my first thought, but either way the work could not have been checked . That's where liability comes in . If the work had been checked and they overfill discovered at that time and corrected then, the owner would have never noticed anything was wrong. Now the cat converter has probably been damaged. $$$$

 

Yea,either way someone would be paying and it wouldn't be me

 

When I used to work for Acura, the system for filling a vehicle after an oil chance started with hitting the button on a monitor on the wall. When you hit the button, someone at the parts counter would pick up. You'd say something along the lines of "4 1/2 quarts on pump 5" and the parts guy would dial up pump 5, and then set the mechanism to shut the pump off after 4 1/2 quarts. You'd pull the hose down from the ceiling, put the nozzle in the valve cover, pull the trigger which locked it in the "flow" position (like a gas pump) and then go about topping off fluids and writing up the lube sticker for the windshield because oil changes paid 0.3 (18 minutes), and the best you could hope for was to break even. It happened on more than 1 occasion that the clown at the parts department dialed in something other than 4 1/2 quarts (or whatever you requested), so you quickly learned to check the dipstick before rolling out. I'm not sure in the time I worked there that anyone ever shipped a vehicle with an egregious amount of oil, but there were definitely some heated discussions between techs and parts guys.

When oil is grossly overfilled, the crank will dunk into it as it spins and this aerates the oil badly. Aerated oil does a poor job at pretty much everything oil is supposed to do, but it would take some time for this to have detrimental effects. Something I'd worry about more is a grossly overfilled oil sump can cause the front and rear crank seals to leak. Do your best to document everything you can and keep an eye out for oil leaks. A front crank seal replacement is expensive, and a rear crank seal replacement is insanely expensive.

 

It should be clear by colour of the oil if it was changed or not. Also if the service tech is following the maintenance interval, it calls for filter change every other oil change. Likely what you were seeing was oil being sucked into the pcv