TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information on diagnosing and/or repairing some 2011-2024MY vehicles (refer to the table on pages 9 and 10 for applicable models and engine), which may exhibit a symptom of excessive oil consumption.
full bulletin at NHTSA ↗2018 Kia Rio engine problems
severe 10 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
10
Recalls
0
Avg fix
$3,100
1fire
When does it fail?
Of the 10 engine complaints filed for the 2018 Kia Rio, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information on diagnosing and/or repairing some 2011-2024MY vehicles (refer to the tables on pages 8-9 for applicable models and engine), which may exhibit a symptom of excessive oil consumption.
full bulletin at NHTSA ↗PITSTOP: LOW OIL PRESSURE AT IDLE AFTER GAMMA 1.6L GDI SHORT BLOCK ENGINE REPLACEMENT - This bulletin provides information equipped with a Gamma 1.6L GDI regarding a 'low oil pressure' concern during engine idle on vehicles engine due to a missing dowel pin, after a short block engine replacement. An internal oil leakage will cause a decrease in oil pressure without the instal lation of the dowel pin location described in this bulletin. Confirm that the dowel pin was installed for an engine exhibiting a low oil pressure concern after a short block replacement.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: MAINTENANCE REMINDER FEATURE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area.This bulletin provides information on setting the "Service Interval Reminder" feature available on most 2014-2023MY Kia vehicles (refer to model list on page 2). If the service interval reminder is set, the customer will be informed to have the next maintenance service performed, which can positively affect vehicle longevity and performance. Refer to TSB ENG241 for 2023MY~ vehicles equipped with the Oil Life Management System (OLMS) feature not included in table on page 2.
full bulletin at NHTSA ↗TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information on diagnosing and/or repairing some 2011-2021MY vehicles (refer to the tables on pages 8-9 for applicable models and engine), which may exhibit a symptom of excessive oil consumption.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 8 most recent
My 2018 Kia Rio is burning 2 quarts of oil every 800 miles, confirmed by a Kia dealership through an official oil consumption test. The issue first started around 110,000 miles and has progressively gotten worse. I have owned the vehicle since it had 40,000 miles, and I have always had the oil changed on time and maintained the car properly. Despite proper maintenance, the engine gives off a…
My car is consuming oil
2018 Kia Rio – severe oil consumption leading to low compression (30 PSI on Cylinder 2) and engine failure. Dealership installed incorrect non-OEM spark plugs prior to failure. Kia denies warranty coverage although this matches known engine defects in other Kia models
My 2018 Kia Rio S (VIN [XXX] ) suffered sudden engine failure at approximately 84 000 miles. I pulled over immediately when the oil light came on, but the engine began rattling and was later diagnosed by the dealer as a bearing/seizure failure requiring full engine replacement (estimate ≈ $15 865). This vehicle uses the 1.6 L Gamma II GDI engine, which is the same engine family already included…
Excessive engine oil consumption which has caused car to enter limp mode
Vehicle has excessive oil consumption defect acknowledged in Kia TSB ENG222. Repeated catalytic converter failures indicate potential overheating risk similar to 2019 Gamma engine recall for fire hazard. Engine burning oil creates risk of critically low oil levels leading to engine failure/stalling while driving. Multiple emission system failures (oil consumption, catalytic converter) suggest…
I've been having issues with the engine for a while I'm constantly getting oil changes and after getting the oil change I would still have to add oil in every 2-3 weeks. 2/14/2024 My Oil light came on back on after putting oil in 2 weeks prior. That day my Car stalled on the HWY all my dash lights( battery, engine and oil light flashed. Ive been to multiple mechanics shop such as Express oil and…
The contact owned a 2018 Kia Rio. The contact stated that while driving on the highway at 85 MPH, the engine emitted abnormal noise with no warning lights illuminated. The contact proceeded to exit the highway and enter a gas station parking lot, and upon exiting the vehicle, it was apparent that the engine had begun to catch on fire. The location of the fire was the front engine compartment. The…
Had engine trouble with your 2018 Kia Rio?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2018 Kia Rio?
It's a meaningful issue. 10 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Based on the 10 complaints filed, engine issues most often appear around 106,158 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Kia/Rio.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.