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When you get your report look at the levels closely compared to the criteria. Engine oil is going to have some gas in it. it is impossible not to. You just don't want excessive amounts. In the one members report it showed .8 and the Blackstone criteria was <2. Gas in the oil in small amounts is normal.
 

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I have been posting of this issue since February. Dealership and kia tech great at not wanting to even recognize theres a problem. Since February, I have had no peace of mind with this purchase. What I have learned... I no longer use 0w20. I use 10w30. With breakdown in viscosity, I want most They allow. When doing OC, I put in 120 oz. That registers at midpoint on dipstick. Alot easier to monitor your oil level increase. I've went to full in as little as 700 mi. Condition has improved with last oil change. After they did " Battery management update"
Never, ever owned a car that fuel got in oil. STAY ON YOUR LEVELS and check reguarly. Keep going to dealership.
 

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Is it possible that dealership techs working on an oil level issue would not think to drop the filter? Nothing would surprise me anymore. I think I'm just going to do the next one ( oil +filter) myself and just fill to halfway up the scale and measure how much extra oil is left in the container. Then watch over time. Crazy issue for a brand new vehicle.
 

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Those of you that have the oil level increasing, can you please post your typical driving habits? Primarily, how far do you typically drive each time you start your Niro?


I’ll be checking mine soon but don’t expect it to be over due to how far it gets driven. Mine has 15,000 miles on it and was bought new just over 6 months ago.
 

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After seeing this thread I decided to check the oil on my 3 month old HEV (3000 miles). Sure enough it was way over the maximum. Due to the poor design of the dipstick it is hard to measure the exact position of the oil (shiney orange plastic and no measuring perforations after max). I found a better way to measure the level was to only insert the dipstick up to the black o-ring on the handle so you can see the level, then add the 1.4cm distance from the o-ring to the end stop. I my case it was about 1cm over the max.

I smelt the oil and although the smell was very strong it was not much different in character from the oil in our other car. Certainly not the same smell as from the fuel tank.

I took it into Kia and they checked it. They said they couldn't detect any fuel either and suggested it must have been overfilled at the factory. They have removed the excess oil and it is now at the correct level. Needless to say I shall be watching the level like a hawk in the coming weeks.

My driving style is 80% economical, 20% normal.
 

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I too have had the oil increasing problem since I bought the Niro in 2017 and will be getting my oil checked by Blackstone for the 2nd time at 44K. My first sample at 29K miles only had 0.8% fuel . Blackstone list it should be <2%. I'll report back with the results when completed.
I drive ~ 50 miles a day and I am ~95% economical driving style in which I have been averaging ~ 56 MPG over the two years of Northeast weather.
 

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In my previous post on this thread (#46), I mentioned that my oil read high, even though I tend to put on most of my miles in EV mode. I checked it again yesterday and it read almost normal.:confused:. (I double or triple checked on both occasions, wiping the dip stick and reinserting it fully for each check. Checked in the exact same spot in my garage on both occasions:level ground).



If you google for something like "oil in gas", you'll find a lot of hits on this topic: it's not unique to Niros, or even Kia/Hyundais. There are people with Hondas and Toyotas talking about this. But there are a fair number of hits for Kias and Hyundais too.



I read some of the hits that Google suggested. Over on the Hyundai Kona forum, there is a fair amount of discussion on this topic. Some of my takeaways from reviewing one of those threads:

  • Someone with a Hyundai Kona had an experience similar to mine: they read the dipstick one day and observed the oil was very high. They read it a week later and it was normal. WTF?
  • A different Kona owner had the impression that his oil level had increased significantly in just one week after an oil change.
  • Some of the Kona folks seem to think that it correlates with cold weather: more of a problem in winter than summer, at least for them.
  • Some of those folks think that upping their oil viscosity has helped with the problem. (But I'm left wondering if it might have been a coincidence: maybe the engine "break-in" was further along at the time they decided to try higher viscosity oil, or maybe ambient temp or something else changed. Correlation does not prove cause-and-effect).
  • At the risk of propagating a possibly unfair and unsubstantiated rumor: several people on that forum suggest that Blackstone's technique for assessing gas in oil under-reports the extent of fuel contamination. They suggest using Polaris instead. Anyone wanting to use either lab might want to inquire with the lab about this question. Apparently they use different lab procedures to develop this statistic.
  • At one point, a Kona owner's dealer tried replacing the fuel pump to correct the problem. Not sure what the thinking was there: some ancient Chevy's had a fuel pump design that could cause the pump to fail in a way that let gas into the oil, but I don't think many (any?) modern cars have mechanically driven fuel pumps connected to the crankcase anymore. Whatever the thought process was, apparently it didn't work.
Sorry: I wish I had answers, but I don't.
 

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When doing OC, I put in 120 oz. That registers at midpoint on dipstick. Alot easier to monitor your oil level increase. I've went to full in as little as 700 mi.

I would worry about putting in less oil into a car. The oil inside you engine isn't just inside the oil pan and filter, but has quite a bit of the engine that it covers. When you drain the oil, it is likely that you do not get all the oil out of your car, rather it mixes with the other oil inside the car that didn't drain. You oil doesn't circulate by magic but through some form of oil pump and pickup by moving parts. So depending on when and how to the engine stops you can have more or less oil trapped in different parts of the engine. If in your case you are sure that in putting in far less oil to only the 1/2 way point on your stick and now it's full, then you should by your own measurements have a very high level of contamination, Why did you not drain your oil right there and then to send it away for testing? An oil change yourself costs you what? $20 for oil if that. The filter should be fine, so just pour out this contaminated oil out and send some of it off for testing and refill the engine back up with clean oil.. Get your piece of mind that your oil is not full of gasoline or other contaminats. I think you will find that it's likely more in your own mind.
 

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I would worry about putting in less oil into a car. The oil inside you engine isn't just inside the oil pan and filter, but has quite a bit of the engine that it covers. When you drain the oil, it is likely that you do not get all the oil out of your car, rather it mixes with the other oil inside the car that didn't drain. You oil doesn't circulate by magic but through some form of oil pump and pickup by moving parts. So depending on when and how to the engine stops you can have more or less oil trapped in different parts of the engine. If in your case you are sure that in putting in far less oil to only the 1/2 way point on your stick and now it's full, then you should by your own measurements have a very high level of contamination, Why did you not drain your oil right there and then to send it away for testing? An oil change yourself costs you what? $20 for oil if that. The filter should be fine, so just pour out this contaminated oil out and send some of it off for testing and refill the engine back up with clean oil.. Get your piece of mind that your oil is not full of gasoline or other contaminats. I think you will find that it's likely more in your own mind.
Most oil in most engines drains down to where you get an accurate dipstick reading within a minute or two. That is SOP, otherwise nobody could get an accurate read on where their oil is. So for people who are getting MORE oil showing, that simply is not normal. KIA Corporate and NHTSA should be contacted and a complaint, question, or comment lodged.

It sounds like there's something hinky with this 1.6. In past research I noted that this 1.6 and the common Gamma 1.6 are different bore & stroke. Ah, found it. This is a Kappa III. The Gamma is the more common 1.6 that's been around since 2010.

https://en.wikipedia.org/wiki/Kia_Niro
https://en.wikipedia.org/wiki/Hyundai_Kappa_engine#Kappa_III

https://en.wikipedia.org/wiki/Hyundai_Gamma_engine

https://en.wikipedia.org/wiki/List_of_Hyundai_engines
 

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When this is a real problem, it can only be a leaking injector on a direct injection car like the Niro.
Not necessarily.


Even though engines of today have tight tolerances, when an engine is cold it does not have a perfect seal between the piston rings and the cylinder walls. As the engine heats up, piston rings seal better but there is never a 100% perfect seal. If there was, an engines oil change interval would be MUCH longer than 7,500 miles.

So with hybrids, the more the engines runs when it is cold, the more dilution of the oil you will have. Also, the more the engine runs when it is up to operating temperature, the more contaminates in the oil get burned or filtered out. The purpose of the PVC valve is to circulate crankcase fumes into the intake to be burned off in the combustion chamber. The PCV system works best when the engine is up to operating temperature. If the engine rarely gets up to operating temperature then contaminates will not be burned off as good as what they will when the engine is ran for a long time at operating temperature.

So no, direct injection does not solve fuel dilution.
 

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So no, direct injection does not solve fuel dilution.
Never said it did. Only pointing out the only route above normal amounts of fuel can appear in oil. It can only come from leaking or defective injectors. If you have a real problem with excessive fuel in oil, it can only be addressed by fixing the injectors (absent shot rings which would lead to oil loss, not increasing oil). Kia and Hyundai have both replaced injectors for this very problem under warranty and I have read half a dozen reports of this happening on the forums. You have to fight for it of course, and there has to be real evidence available. Personally, I'm not convinced by the issues reported on this thread. Fuel contamination within normal limits suggests errors in oil change volumes (which I've experienced) or trouble reading the dipstick (admittedly terrible design).
 

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It is nice to see a number of replies that recognize fuel in the oil is normal. It is not possible to have engine oil that doesn't have gas in it as the above replies recognize.

It is also why all the oil testing companies have an acceptable level of fuel in the oil - it is completely normal to have some fuel in the oil.

Abnormally high levels of fuel in the oil of course are a different issue and not normal.

I think 91cavgt give a good explanation of how fuel gets into the oil.
 

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I just got my Niro back from the dealer after two weeks. They said the high pressure fuel pump and fuel tube were leaking gas into the valves and replaced both.

It was 7 months and about 2500 miles since the last oil change by the dealer I bought the Niro from.
 

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Just wanted to give an update to my latest oil analysis from Blackstone labs. My oil had increase ~1/4 inch on my dipstick over the 6400 miles. They only show fuel at 1% to their upper limit of 2%. Still not sure what could be causing the increase, but the good news is that all of the other numbers look good, so there does not appear to be any excessive wear being caused. Will be keeping any eye on this over the next couple of oil changes.
 

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To the speculators out there. If you actually had a oil dilution problem ( like I do ) You would do more than speculate. I believe this forum was intended to be of help to all of us niro owners that we may share what is going on with our cars that it may benefit us and others. I find it very dissappointing that some lose sight of that. That being said... Fuel in oil in measureable amounts is not normal or acceptable. Fuel in oil has ben a problem across many makes and models with gdi. In the case of my niro the oil increase was alarming and obvious. The viscosity reduction and fuel smell in the oil was as well. The dealership simply passed responsibility of addressing this problem back to me and the KIA TECH LINE. It took seven months. KIa sent a corporate specialist to work on my car. Dropped it on Monday. Done on Friday. They changed out the high pressure fuel pump. They stated they have seen in a few cases across different makes and models where the hp fuel pump leaks fuel into the oil system. This pump is cam driven , therefore has direct contact to the cam and oil. Hopefully this fixes my problem. Time will tell. I've never owned a car that I felt necessary to check the oil on a weekly basis. This one I do. If these pumps can have issues out of the box, they can have anytime. Finally I would like to say, I really like this car. This issue could happen to any make or model and I dont blame the niro design .
 
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