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Hey, driving my 2018 blue for the first 500 miles, I did a check up of the engine oil level and
discovered that the oil level on the dip stick was 3/4" to 7/8" past the full mark. I called the self acknowledged hybrid specialist service advisor at Hyundai of Kirkland, WA and told him I had checked the oil level in the morning after the car had stayed off for 12 hours. He said that the over fill was normal and to not worry about it. I've been changing car engine oil for about 50 years, and I am a bit wary of his claim. Your thoughts on what I should do.

Steve.
 

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I checked my car today cold. Slightly over full but I realized as I write this it wasn't level. Rechecking in my level garage now... The same! The manual doesn't say what the calibration is on the dipstick lines, but if it is the usual one quart US, than I'm a quarter of a quart too full. Of course, that probably translates into just right when the car is at working temperature. I'll check again the next time I drive it.
 

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I have been doing the same checks for oil level and finally did one with the car on the level. Oil on the wire above the Full mark.
Looks like the service the car had before delivery added too much oil. Oil also ended up on the air filter case unit left hand side clip 'hole'.
Somehow some oil ended up under the air filter. Oil would normally only get there if there is an oil burp via pipework meant for oil fumes... eg going too fast around a corner after an overfill (at least this happens with over 3/4 full on an RX-8 - where too fast never happens!).
Given the oil on the top of the air filter case and around the edge of the air filter it's possible that it entered via an oil splash whilst filling.
Going to have a word with the service manager.
1 - overfilling is never a good idea
2 - might mean the MAF sensor needs a clean if the oil did burp from the sump.
3 - was the air filter really changed
4 - why does myhyundai not show the service history yet?
5 - the service was done with the Map SD card in the sales persons drawer... so a map upgrade didn't take place.

The engine has only driven around 20-30 miles on ICE during 500 miles of EV driving. So shouldn't really be affected too much.
 

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Service guy said oil was a little overfilled but it is hard to see on dipstick. (Not totally convinced).

See photo after drain and refill.
There is an oil free section near the full mark.

Dipstick looks like:-
LOW________FULL__/?\=====wire part.
The Blob between the Full mark and the wire looks shiney even without oil. Perhaps this needs to be a different surface texture.
 

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I have a serious problem with the oil: I checked the oil level after 14000km and found it was above the maximum level. I have noticed this at the service. At 15000 km I switched oil and at the next check I found the same thing. We went back to service and said that the gasoline pump is defective, and gets gasoline in the oil bath. They replaced my gasoline pump, changed the oil again, but found the same thing: oil level over maximum. What is the exact amount of oil to enter the engine?
 

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I have a serious problem with the oil: I checked the oil level after 14000km and found it was above the maximum level. I have noticed this at the service. At 15000 km I switched oil and at the next check I found the same thing. We went back to service and said that the gasoline pump is defective, and gets gasoline in the oil bath. They replaced my gasoline pump, changed the oil again, but found the same thing: oil level over maximum. What is the exact amount of oil to enter the engine?

It is not clear from your post whether you ever saw the oil at the correct level, and it is easy to get erroneous reading due slope or recently run engine.
You need to check the oil level on a level surface with the engine cold i.e. not run for several hours at least. If it is above the maximum line remove oil to get it to the maximum. Then re-check at intervals a few days of driving apart ensuring that the conditions are as in the first sentence. If you notice the oil level rising then you have a problem with fluid (water/petrol) entering the oil system.
 

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It is not clear from your post whether you ever saw the oil at the correct level, and it is easy to get erroneous reading due slope or recently run engine.
You need to check the oil level on a level surface with the engine cold i.e. not run for several hours at least. If it is above the maximum line remove oil to get it to the maximum. Then re-check at intervals a few days of driving apart ensuring that the conditions are as in the first sentence. If you notice the oil level rising then you have a problem with fluid (water/petrol) entering the oil system.
I know very well the conditions in which the oil level is checked and I have done this several times to be sure. Surely the gasoline got into the oil because I felt the strong smell of gas on the dipstick. Now I'm not sure if the problem is repeated after replacing the gasoline pump or putting more oil on it than needed.
 

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Surely the gasoline got into the oil because I felt the strong smell of gas on the dipstick.

That clarifies the matter. if you'd mentioned that fact in your original post mine would have been unnecessary.;)
If it is still happening as you describe I think a return to the dealer is called for. I'm fortunate that no liquid fuel comes anywhere near my car.:)
 

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Homer. I suggest you remove some oil until you can see a gap in the oil on the dipstick. (Use pipe down dipstick tube)

My dipstick smells of fuel... I drive a PHEV, which switches the petrol engine on for the very short times, around 1 minute, when the engine itself is cold and the ecu must run rich.

Since my earlier entry here #7 the car has gone 3400 miles. You will see my photo of my dipstick there. I drove 350 on petrol in April and maybe gone 30 miles since but all with the engine cold.
When the engine is cold, the ecu has to run the car rich and some unburnt fuel will bypass the pistons into the oil sump.
I would say this is normal for cars that do short journeys... especially a PHEV that runs on electricity most or 99.9% of the time.

Other google hits... May not apply to Ioniq!
Fuel rail pressure releasing via injector which has not closed correctly, when engine switched off. (Check for fuel smell with engine hot and only just switched off... then again a little later)

Fuel pump diaphragm leak into sump... unlikely as modern fuel pumps sit in fuel tank(Not on the engine block connected to the camshaft) and the only time fuel can get into the sump is by bypassing the piston rings.)

I will try to run my engine to full temperature and report back if that fuel smell has reduced. I would expect the hot oil to release the fuel back around the sealed emmisions pipework back into the air inlet.

The tissue I brought in from the dipstick no longer smells of petrol... after 15 minutes.

As petrol really stinks, I winder how little petrol needs to be there to make it smell... 1 part in a million?

Can we please start a PHEV dipstick smell check... report if you run in HEV a lot?

Photo of current oil level below.
 

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Hi guys. I own Hyundai ionig hybrid 2017. Thanks to your posts about this issue, i have checked my oil level and it is double over the top. Also I can smell petrol in oil. 8000 miles on clock and service due in another 2000 miles. Check appoinment made with dealer on 25th June. Let you know then what is happening. Thanks Dave.
 

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petrol in oil ?

I'm a little confused by this thread, it has been suggested that petrol/gasoline is getting into the oil pan/sump. How does petrol get into the oil unless a piston ring has failed:confused::confused:
 

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Evidence for fuel in the oil includes: 1. The smell of gasoline. 2. The oil level rising over time. 3. Poor gas mileage. If the car's computer calculates a significantly higher gas mileage than your own calculations, fuel in the oil may be the reason. 4. Have a UOA (Used oil analysis) done. Take a small sample of oil and send it to a company who does UOA's. They will tell you if you have fuel dilution in your oil and at what rate.

If you have #1,2,3 and the dealer doesn't believe you, I would do #4. I've used this company https://www.blackstone-labs.com/ but there are others in Canada and Europe.
 

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Does to much fuel in the oil make the lubrication quality of the oil go bad and need it to be changed prematurely?

Is the overfilled oil system losing the surplus of oil into the engine to burn it, loosing more and more good oil, degrading even further? (Maybe check in the air filter compartment for oil traces that shouldn't be there.)

Better do a compression test on the cylinders to check the piston rings for problems hot and cold. Like @BDG said, The oil system should be a seperate system.

Definitely a dealer problem. Damage to the engine showing in the future could be the result of this problem. Better look into it quickly.
 
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