Crankcase (pcv) problems of the 2017 Kia Motor Optima

Engine is failing and using over 3 quarts of oil every 700-100 miles. Spark plugs have become oil fouled and replaced all 4 spark plugs June 11th, 2024 and replaced all 4 spark plugs again January 12th, 2025. Today July 7th, 2025 check engine light came back on with engine misfire code p0303 cylinder 3 misfire, changing spark plugs again today. My safety is put at risk because oil consumption is a know issue with kia gdi engines. At any moment my car can run out of oil if it is not check every other week causing my engine to completely fail or a spark plug become oil fouled and a spark plug needing to be replaced. In July of 2024 when this happened I was on the highway going 70 mph and my car just completed shut down. I could have been seriously injured had I not been able to pull over and only been 5 miles away from my home. I called kia today to start an oil consumption test, stated I am the 2nd owner and while this is a known issue I will pay for and upper engine clean which is only a band aid. This problem has been confirmed with kia that the gdi engines are consuming oil. I have also replaced all engine coolant, coolant temperature senor, thermostat as well as the pcv valve.

The contact owns a 2017 kia Optima. The contact stated that oil was leaking from the vehicle onto the driveway of her home. The vehicle was taken to the dealer, and the mechanic stated that the spark plugs needed to be replaced. The sparks plugs were replaced but the failure persisted. On another occasion, the contact noticed that oil was leaking from under the vehicle again, and the vehicle was taken to the dealer to be diagnosed. The contact was informed that there was oil cylinder #3 spark plug. The spark plug and pcv valve was replaced; however, the failure recurred. The vehicle was taken back to the dealer and the contact was informed that the engine needed to be replaced. The vehicle was not replaced. The manufacturer was contacted and stated that the contact would receive a call back. The failure mileage was 93,226.

My car is consuming major oil. I am having to put at minimum 3 to 4 quarts of oil every 3 days. I am having major loss of power. My car has oil fouled far too many spark plugs. In the last 3 months, I have had to replace the spark plugs three separate times. Within the last 3 weeks I have replaced the following: 1. Ignition coils 2. Valve cover gasket 3. Pcv valve 4. 2 separate sets of spark plugs and 1 singular spark plug for cylinder #4. My car is having a major oil consumption problem and the performance has been severely affected.

On November 16, 2020, lucy robinson was driving her 2017 kia Optima when she started seeing smoke. She pulled into a gas station and the engine was on fire. The fire department extinguished the fire. A cause and origin was conducted and it was found that the fire originated within the engine compartment. The fire was caused by the release of heated oil coming from the leaking pcv located at the top portion of the valve cover.