Noticed that my 2017 MP3 500 was reading way lower on fuel economy, usually around 50-55 mpg, and was getting around 4-16 on acceleration.
Checked oil and the case was past full! Smells heavily of gasoline as well. Oil color is still good, just changed it about a month ago.
Google search yields lots of different possibilities, mostly centered around piston rings not sealed.
Anyone ever change these out, or have a similar issue?