5.0 liter v8 NA engine ran with 16 quarts of oil for 30 miles

[SilverPanzerV8]

Hi everyone, new poster here! Your thoughts, advice and recommendations are requested please.

I have a normally aspirated SL500. the R230-chassis (M113 5.0 L V-8) with 69,000 miles. Not a turbo, and not supercharged. She's my baby, I totally pamper her and take great care of her!

So yesterday, my tech added 8 quarts of Liqui Moly full synthetic to my engine without draining the old oil.

This is double the normal capacity. I then drove it for 30 miles, keeping the RPM's under 2k the whole time.

It blew blue smoke and ran really rough, I only realized what had happened after the dashboard lights lit up red and alerted me. The check engine light came on. I then drove it back to him and he did a full drain and fill with a new fleece filter, explaining that he forgot to open the drain valve and that it was my fault for distracting him by talking to him when he was doing the oil change.

What's the impact or damage? What is the recommended course of action now? All codes have cleared and there are no errors or lights at this point. TIA!

 

[TomYoung]

Agree with all - except I would never use Uro parts on any car I own.

Case in point - OEM Volvo PCV hoses last for 20 years.

2004 XC90 had Uro hoses installed in the PCV system - three years later they were cracked and leaking.

Uro is generally garbage. Stick with OEM for the PCV system parts on your Mercedes.

URO is an absolute no-go zone. I have been burned a few times replacing window switches in one of my European cars. They fail instantly. On the Hondas and VW ‘s I work on, I would love to use the factory parts all the time, and feel guilty watching the Car Care Nut and TE Videos doing it right on the cars they service, but I also need to keep food on the table. Vice Grip Garage definitely calms things down when he grabs whatever is on the shelf at O’Reilly’s.

 

[50yr Street Mech]

I've heard of double gasketing on the filter by accident. That alone is bad. This guy made 2 mistakes. Didn't drain the oil AND didn't check the dipstick...You say to him....Bye Bye

 

[Egg_Head]

I've heard of double gasketing on the filter by accident,,,,but this goes tooooooooo far. Dump this clown.

At the surface that would be a logical response. However, the R230 platform is uber complicated not only to diagnose but also repair. This is nothing like working on a Honda Accord with mechanics on every corner. If you are the owner of one of these and you have found someone willing and able to work on them, your tolerance threshold adjusts accordingly. At worst the OP justs needs to apologize profusely for distracting Einstein and change his own oil in the future.

 

[D60]

Honestly, I rarely do a level check on applications with which I'm familiar and esp on vehicles I've serviced before.

However before filling I make sure I have a "mental picture" or memory of removing and replacing and snugging the drain plug AND of removing and replacing the filter.

I suppose if I got pulled away mid-job this would be problematic but then I'd most likely double check EVERYTHING. If I cant remember, I panic and check again.

 

[50yr Street Mech]

I agree. I'm not familiar with the vehicle. But what was done is unacceptable in my eyes. It's still an internal combustion engine with a drain plug, oil filter, dipstick ( even though the dipsticks are going bye bye ). I don't care how brilliant he is. Very dangerous mistake made on a very expensive engine I presume. If he wants to give him a pass on this, so be it. But, the mechanic had the gall to blame the owner just because he was talking to him ???? C'mon..really ?!?!

 

[ARCOgraphite]

Hopefully the oil had a good dose of anti-foaming agent. The slow drive likely helped.
OTW could have lost pressure and pounded the rod big end inserts and collapsed any hydraulic lash adjusters.

Like some other posters stated the unit likely has PCV plumbing and the intake full of oil. Hopefull any future WOT wont gulp too much and BANG. Oil doesn't compress well.

Dealer did this to my wife's Subaru. From the passenger seat, I noticed it was lazy. When we got to my BIL house for a party, later in the day I drained the excess before went home some 40 miles. Car did O.K afterwards.

My old GF's car in the 80's, the Jeep dealer forgot to add oil after draining it. Somehow the stone simple six-er did OK moving about 3/4 of a quart around that black CJ-7 Laredo for a couple hours.