The reason there is a time interval for oil changes is that some fuel will eventually leak into the oil reservoir over time diluting the oil. Even the most expensive engines have this issue.
Thank you for the reply. I'm real interested in your real world range testing. My wife and I just put a down payment and reservation for a 2023 Outlander Phev when they finally make it to the USA. We've never owned a Mitsubishi before so this will be a first for us. Do they not offer the...