ChopperDan64

2016, A8 with 2k miles. Couple weeks back it started being cranky when trying to start in in the mornings. Stopped for gas the other day and almost wouldn’t start. Sweet, new $110k car sitting in the gas station not starting when the guy in the 500 Fiat drives by with a thumbs up and a big grin… butthead. Check engine light flashes on for about 20 seconds on the way home.

Get home, and sometime in the next hour it pukes about ½ quart of oil on the garage floor. Obviously, there is a real issue now. Tow it to the dealer… flatbed guy is real proud to have a new Z06 on his truck.
Dealer calls and says there is fuel in the oil and the oil came out of the air box because the oil system was overfilled because of the amount of fuel. Ahhh… we duno what the issue is, waiting on GM.

Anyone experienced this?

SS MPSTR

Holy crap! No, and I hope they figure it out quickly. Keep us posted.

OBSSSD

Another motor gone...

Movie Muscle

Ouch that will have thinned that oil out a wee bit. Sorry bearings we just shorted your life.

RandomTask

Only thing I can think of is your piston rings being absolutely shot but with 2k miles I am at a loss to explain how that much fuel got into the oil. Regardless, with the engine having been run like that, demand a complete new one from blower to pan. All your bearing surfaces are probably destroyed.

bjones7131

Not good, anxious to see root cause and fix

Jpjr2016

GM: Sir we suspect you may have mistakin the oil fill tube for the fuel tank at the gas station.

You will receive an email in a few days requesting feedback, hopefully we provided you with excellent customer service.

Katech_Zach

Not that I've ever heard of this before, but the DI pump is driven off the cam and if it had a major leak at the bottom it would end up in the crankcase.

robertbruce

Who did your 500 mile oil change?

Snorman

OP...if it puked that much oil, it sounds like the dry sump was overfilled. When that happens, there is nowhere for the oil to go. Dealer or shop errors when changing oil on Z51's and Z06's are well-documented (not sure why it's so hard for them to do).

I'm wondering if that's a big part of the problem. Good luck. Despite what some BS some on here will try to spread, engine failures on these cars are not very common with only 6 being reported on this forum. Good luck!
S.

cv67

ChopperDan64

As originally stated, the oil system was overfilled with fuel and why it puked. Criswell did the 500m oil change and I checked it twice since the oil change and it was just fine.

I grew up as a mechanic and I've restored several old trucks. When I stepped into the garage, it smelled like my 53' Chevy P/U... oil and gas mix. Normal for an old truck, not for a new Z06. This is when I looked under the car and saw the dump. Didn't know there was fuel in the oil until Criswell called.

When I rolled the car out of the garage for the tow truck, I checked the oil. This was when the engine was cold and not per the prescribed method in the owners manual which is warm engine and wait 5-10 min after shutdown, it was about an inch over the full mark. Since I've never checked the oil when it was cold, I'm unsure if this is normal or not.

I'd be grateful if someone would check their oil when the engine is cold and let me know what the level is.

UPDATE: Just as I posted this, Criswell called. The tech is 90% sure it's the high pressure fuel pump as that is the only place the fuel and oil mix. They believe there is a failure of the fuel pump. There are no fuel pumps available, in the system, from GM or anyplace. They've contacted the GM rep... more to follow after the holiday. I also reminded them, we have no idea how long there has been fuel in the oil and all the bearings could be compromised.

Ahmed_otb

I'm close on doing my oil change, so how many oil bottle should I fill up the car?

OnPoint

Sounds like Jason's thoughts on the fuel pump may be a good place to start. OP - you might mention that to the techs at the dealership.

Ahmed_otb

from what you have described it looks more like it was over filled,

hopefully everything clears out

Poor-sha

Honestly folks I don't know how you can say it was overfilled. Dan already stated that he had checked the oil after the oil change and it was fine. The oil level should be lower when cold not an inch over the full mark.

It sounds like something in the engine dumped fuel in to the oil system and that diluted the oil and overfilled it. Jason is the most knowledgeable person I know on these engines and is probably right about the source.

The hard start could have been because the engine was having a hard time building pressure because of a leak somewhere. As it is these DI cars take longer to crank when they've been sitting because it takes a bit to build pressure.

Dan, I'd be talking to them about a new engine. If you were driving it around with the oil diluted with 10-20% fuel I suspect that there was bearing damage especially if the car saw any high RPM use. Let GM tear the engine apart on their own time and figure out what and why failed but I don't see any sense in trying to repair this one.

Criswell is a big Corvette dealer and should be able to make this happen.

Snorman

Ahh...sorry, I misread the end of the post looking at it again.

And yeah...if there was fuel in the oil thinning it out, the bearings might not look so good. Again, good luck, and being one of the largest Corvette dealers out there, I'm sure Criswell will take good care of you.
S.

davepl

I'm betting on the guy who said the DI pump broke up where its driven and filled the crankcase with fuel which got vacuumed back to the dry dump tank, causing the oil system to overflow and puke out.

That'd be a $500 second-hand diagnosis fee, but I'll waive it as a I feel bad for anyone who's new car breaks. But don't freak out, mechanical things break and these are no different, except they're probably better, given how soon we know about anyone's problems and how few we actually see!

Fortunately the dealer will pretty much have to find and fix it! You wouldn't want to drive it or run it until then as your oil is likely seriously diluted so whoever called for the flat bed was thinking. Of course "drive that car as it pukes out oil" would be a hard sell...

RandomTask

Makes way more sense. And explains the hard starts (tough time getting up to pressure).

I am curious as to what effect this would have on the blower as our cars tend to ingest oil. Regardless, bearings are probably damaged. I'm sure Criswell will take care of you though.

I’d love to get my hands on that LT4 though. . . throw a new set of bearings in it and see how long she can eat.

TEXHAWK0

Since the fuel pump can put up over 2,000 PSI, it is easy to see that if fuel pressure was release into the crankcase, it would blow oil everywhere.