My wife traded in a 2019 CX5 Touring for a 2021 CX5 Signature with the 2.5 turbo. Her low oil light came on at about 8,500 miles. I checked it, and filled it. It was at least half a quart low. I went to the Mazda service department, and they told me it was a known issue caused by the wrong valve seals being used. Apparently they produced a very small number of diesel engines, and somehow the valve seals for that engine were 'accidentally' used in some of the 2.5 turbos in 2021. I don't believe the 'accidental' part. I imagine they just had leftover valve seals from the diesels and figured they could use them in the gasoline version. In any case, he told me Mazda was still trying to figure out how best to fix the issue but at the lowest cost possible. Mind you, this was just a couple months ago that I stopped at the dealer. Around middle of November 2022. So they can engineer the Skyactiv engine, but they can't engineer a fix for this issue yet? I agree that they seem to just be hoping that through attrition these engines will fall out of warranty or people won't even do research to see why their vehicle keeps needing oil. It will be our last Mazda. Lucky for us ours is a lease that we can turn in.