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the car didn't start burning oil until about 45k miles. It was down about 1.5qt so I had the pcv valve changed and had a carbon cleaning service done. The car was totaled a few weeks later so not sure if the actions I took did anything to help. I would recommend having the pcv valve replaced as...

Thanks everyone. I'm not too concerned with the oil will go with the manufacturer suggested OW-20 at 3500 miles or so OCI. I was more inquiring regarding what particular fuel additive to use on this 2.5 engine.

Thanks for the info.

Thanks JustN89. At the time mechanic said old car's pcv valve was not working properly, that may have been part of the issue but hard to since the 2.4 theta 2 engine has had so many issues including oil burning

Hello, looking for recommendation on best fuel additive (1st application) on a 2023 Hyundai Sonata 2.5 Smartstream non-turbo GDI/MPI. The car is 12 months old with 11,800 miles and has always been filled meticulously with top-tier fuel. It has had 4 oil changes done with full synthetic OW-20 to...