I have a 2014 mazda3 with 131k miles. It's prob the most reliable car I've owned. I had the catalytic converter replaced, some suspension stuff, and then jus normal maintenance from there.
I had the same issue with a 2016 CX5. Dealer overfilled the oil. Drove home20 minutes at 30-40 mph with no problems. The next morning my wife got on the highway and the dash lit up like a christmas tree. Smoke from the exhaust and oil residue from the tailpipes and on the rear hatch. Let the car sit for about an hour and drove back to dealership at low speed. They drained and changed the plugs. Still have the vehicle. No lasting effects on the engine. It does need a converter.
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The brand is registered in Japan.
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