2021 Hyundai Tucson - High Oil Consumption and Blue Smoke

Question

I bought this Tucson new and it only has 45,000 miles. Lately, I've noticed the oil level isn't even touching the dipstick by the time I'm halfway to my next oil change interval. There are no leaks on my driveway, but if I floor it to get on the highway, I see a puff of bluish smoke in the rearview mirror.

The dealer told me 1 quart per 1,000 miles is 'within normal operating specs' but this seems insane for a modern car. I'm worried the engine is going to seize up like all the other Hyundais in the news.

DPF_Doc · Accepted Answer

✅ Confirmed fix: You need to push for a formal Oil Consumption Test at the dealership. This is a known issue with the piston rings on the Theta II engines. Hyundai recently released a TSB for a 'Combustion Chamber Cleaning' procedure using a specific soaking agent to unstick the oil control rings.

In my case, the cleaning didn't work, and because I had all my maintenance records, they ended up replacing the engine block under the lifetime warranty extension (PI1803). Don't take 'it's normal' for an answer; start the paper trail now.

DefDeleteDan_NO · Answer

It's likely the valve stem seals. If you see smoke specifically after the car has been idling or on a cold start, the oil is seeping past the seals into the combustion chamber. Replacing them is a big job but fixes the smoke.

2021 Hyundai Tucson - High Oil Consumption and Blue Smoke

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