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I just too my car in for first oil change, ~4500 purchased 8 months ago. Check engine light came on a week ago and my gas milage for the past two weeks went from about 30 MPG TO 20 MPG. The diagnostic for the computer said a coolant thermostat needed replacing and they had to order and reschedule arrive for that then they started my oil change, i was in the waiting room and they actually grabbed me to show me a problem. It was my oil leaking and they were sure from where and told me it’s going to need to be dropped off so they can figure it out, which I’m doing in a few days. Also said there’s no thermostat in my car sooooo they have to figure out why the card was saying that code. After oil change my drive home my MPG INCREASED, I can only think it has to do with now having a full tank of oil lol. Glad I googled this when I got home, because this is prob the issue!
 

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'22 SEL +Convenience +Premium in Intense Blue
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No thermostat??

Umm if your mileage dropped due to lack of oil I would be afraid of that engine that must have caused serious damage.

Sent from my Pixel 5 using Tapatalk
 

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Did my brake-in oil change at 2000 mi and looked at the pan -- it is leaking, oil seaps through the rtv gasket!!! Tucson hybride 2022, 1.6t. It seems that this is a common problem for this engine ( made in korea) not only in Tucson but in all Hyundai cars with this engiene ( look at speedcar 99 YouTube for 2022 Sonata) as well as Kia. It would be nice to know or estimate in the forum how many vehicles affected and may be Hyundai should do a recall on this issue.
 

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Took mine (2.5L, SEL) in today for the first (7,500 mile) service. I had observed a small oil leak from new, but I didn't detect any significant change in the oil level over time. I pointed out the leak to the service advisor, and it was diagnosed as a leak from the oil pan gasket. They're fixing it and I should be able to collect it later this week. I'll keep my fingers crossed that the repair goes well, and that it lasts.
 

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Where was the oil leak on your SEL, like on the ground? I'm similar mileage coming up to my first oil change, would like to inspect before I take it in.
 

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Yes, pd1601. As yours is the first one reporting a leaking oil pan on a 2.5 I'd sure like as much background on the issue as preparation when mine is delivered (~May/June). Of course, by then it may have grown to a TSB for current drivers and corrected by then for new deliveries. To further complicate things, I JUST NOW found out Hyundai-es are assembled in Czech Republic as well as Mont. AL. IDK if that includes Tucsons, but interesting to note whether it's a plant-specific shortfall. And of course whether either or both the 1.6 and 2.5 are made in the same engine assembly facility, - or separate from the auto assembly plants.

Lotsa permutations to triage.
 

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I'd noted some very slight "spotting" under the vehicle where it is parked in the garage. I cleaned it up and then noted it would occasionally drip still. This was pretty much occurring since new. I thought it might be a crush ring or the like. The VIN for my vehicle begins with "KM", indicating it was built in Korea, and my understanding from having done some reading is that it is the Korean-built vehicles that suffer this issue, and not those built/assembled elsewhere.
 

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Yes, pd1601. As yours is the first one reporting a leaking oil pan on a 2.5 I'd sure like as much background on the issue as preparation when mine is delivered (~May/June). Of course, by then it may have grown to a TSB for current drivers and corrected by then for new deliveries. To further complicate things, I JUST NOW found out Hyundai-es are assembled in Czech Republic as well as Mont. AL. IDK if that includes Tucsons, but interesting to note whether it's a plant-specific shortfall. And of course whether either or both the 1.6 and 2.5 are made in the same engine assembly facility, - or separate from the auto assembly plants.

Lotsa permutations to triage.
My understanding from what I've read is that it affects those built in Korea (the VIN begins with a "K"), rather than in Alabama (VIN would begin with a "3", I believe). Mine was built in Korea. Vehicles may well be built in the Czech Republic for the European market, but I don't know anything about that. Under the vehicle, there appears to be a piece of "protective trim" for want of a better word that lies under the oil pan. If the vehicle is lifted and the piece removed, one could probably tell from inspection if there was any leak or not.
 

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Well IBD, thinking only the plug-in was built overseas. Just internet sleuthing here, as the Hyundai website is not exactly a bottomless pit of detail. Thanks for filling in --> some <-- of the blanks. And yes, I noted the 'underhatch' at least for the 1.6T while watching one of the You-Tubes.
 

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Well IBD, thinking only the plug-in was built overseas. Just internet sleuthing here, as the Hyundai website is not exactly a bottomless pit of detail.
When we bought last summer, there was a mix of KR-built and US-built. Not sure if that is still the case. The KR ones had Nexen tires (Korean brand), the US ones something else. You might want to ask your dealer for a VIN number in advance of receiving the vehicle. Maybe the problem has been fixed now on newer vehicles being shipped from Korea.
 

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Ordered for wife on V-Day (how romantic)

3/10 - salesperson messaged:
"Car has started production."
"No other information is available at this time."
"vin number will be completed soon!"
"Current eta for finishing production is March."
"May to June delivery time frame"

I want to give the steps each a reasonable time to play out, but yes I'm hunting for that VIN ASAP. And for a variety of reasons !
 

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If you have a hybrid it's only built in Korea at this time.

The affected engines are the smartstream 1.6T which are the only ICE mated to the electric motor.

The issue with the lack of sealant on the oil pan must of been resolved months ago.

I can not find any TSB or acknowledgement publicly from Hyundai on the issue or apparent silent fix date.
 
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I'd noted some very slight "spotting" under the vehicle where it is parked in the garage. I cleaned it up and then noted it would occasionally drip still. This was pretty much occurring since new. I thought it might be a crush ring or the like. The VIN for my vehicle begins with "KM", indicating it was built in Korea, and my understanding from having done some reading is that it is the Korean-built vehicles that suffer this issue, and not those built/assembled elsewhere.
My 1,6 hybrid is built in czech republic and i have the same problem with oil drips. I’m going to have it serviced next week.
 

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I just too my car in for first oil change, ~4500 purchased 8 months ago. Check engine light came on a week ago and my gas milage for the past two weeks went from about 30 MPG TO 20 MPG. The diagnostic for the computer said a coolant thermostat needed replacing and they had to order and reschedule arrive for that then they started my oil change, i was in the waiting room and they actually grabbed me to show me a problem. It was my oil leaking and they were sure from where and told me it’s going to need to be dropped off so they can figure it out, which I’m doing in a few days. Also said there’s no thermostat in my car sooooo they have to figure out why the card was saying that code. After oil change my drive home my MPG INCREASED, I can only think it has to do with now having a full tank of oil lol. Glad I googled this when I got home, because this is prob the issue!
Your engine is shot. Afraid to tell you. When the car drops in mpg due to low oil, means there was physical mechanical drag inside your engine. And if you had that drag, make 100% sure you ate bearings and races. You will have a oil co sunsuming car from now on. This scary! I'm thinking of buying a 2022 but these oil issues are scary!
 
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