Exactly my thought, though I don't really know how it would tie in with the cold weather overfueling, unless something in the system is getting crossed signals."Molybdenum compounds, for example, not only provide frictional benefits, but also have been shown to decrease LSPI when used at high levels."
I guess this's part of reason why Mazda recommends Mazda Moly oil. Our 2016 CX-5 has been using Mazda Moly oil since new, and it's mainly for wife's daily local commute with 10 miles one way to work. I have only noticed some oil consumption issue, not oil raising issue.
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